PDF malware analysis — malicious · 46265310c2a2282b

MALICIOUS

PDF

166.3 KB Created: 2021-08-10 05:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 916df4bb1514513217d43189ed5b392d SHA-1: b78dc7ebf62e6e0ee9af9f015048a0592cb74f4e SHA-256: 46265310c2a2282b590f067c34076975828a6d999e6058b9b5652dd603127d0e

252 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1505.003 Server Software Component: Web Shell

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan. The heuristics indicate it contains a link farm and attempts to lure the user into disabling security software and executing commands via copy-pasting into a shell. This suggests the document is designed to facilitate the download and execution of a secondary malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.8382

Heuristics 10

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
Security software disable instruction high SE_SECURITY_BYPASS

Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://chcial.ru/uplcv?utm_term=need+for+speed+most+wanted+2005+pc+download+rar+highly+compressed PDF link annotation
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/f9e8853a8ceb1687db4eef532ee74474/38875203616.pdfIn PDF document text
- https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/fd8554a66db714eeec55086874bcb6fd/muxakokamozunifevibareviz.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/558af2e2799c1aa20d3229301af51b75/savabipogi.pdfIn PDF document text
- http://guides2alpes.fr/uploads/file/jikuzoribuvanivugom.pdfIn PDF document text
- http://banphimchuot.com/userfiles/file/rezekixazokinomavez.pdfIn PDF document text
- http://suamayin.biz/userfiles/file/31074342778.pdfIn PDF document text
- https://webhosting4.net/media/file/38745880893.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a8d50f57ffe8b503bc2390ab995ee955/pexelaker.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/9d31a906db12285c6ac1eb208c860132/puxoviwivofonofinemidir.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a1108aeed7e66ebf123238c602fd2199/xakejuguwozomeb.pdfIn PDF document text
- http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c24ccdd1e30---kowejamowodutidit.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/8d08805fcb618312f23d0fcab6171226/puliwan.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/a48b8b69a04d00ec469bae5b74ae9f10/gisanowefuda.pdfIn PDF document text
- http://beveragesgs.com/userfiles/file/fukojem.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072170c8ec8b---38641848789.pdfIn PDF document text
- http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/fobavozafovosu.pdfIn PDF document text
- https://zahnersatz.pl/userfiles/files/zevokeramegerel.pdfIn PDF document text
- http://webinaris.org/ckfinder/userfiles/publics/files/59735470019.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d22224446---54627276833.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/ee49a35eb0912d29312e2bc769a2756b/xefiwul.pdfIn PDF document text
- http://ozdesignhouse.com/app/webroot/uploads/files/repikapimunejolar.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/582fcfe4050c110e36a4da44767d4d77/51413042762.pdfIn PDF document text
- https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5ba4b71e2---40455603680.pdfIn PDF document text
- https://dovolena-jiznicechy.cz/uploads/71300980048.pdfIn PDF document text
- http://cuatudongnhatrang.com/uploads/files/kesokazubulunuvipagotumav.pdfIn PDF document text
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ad05c189fb81b78b06c631dcd7b8a447/86370674247.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00020467.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20467	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00021c7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x21C7E	11620 bytes
SHA-256: `7d7c06fa720bf3534bf03631f2a2a4307f5f6a7d7b7bf42b3fd846835725c37a`
`font_02_sfnt_off000237e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x237E9	19448 bytes
SHA-256: `1b8902283b8b22f987ff4fec6c21b74bd242f0f0c957e037db68d97641b24e68`
`font_03_sfnt_off00026aeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x26AEB	17960 bytes
SHA-256: `5d9919775c5c470085744882f5244c0e0f52278019d32f8f1089f0d7dea26e6c`

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