PDF malware analysis — malicious · 4273a4bec8617ceb

MALICIOUS

PDF

88.4 KB Created: 2021-07-18 19:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 98a4a1a9ddad3b64221ab3696b6f3154 SHA-1: 7974577dc40f43a73644b57d589286300b451f24 SHA-256: 4273a4bec8617ceb3dcfd092ca1d4dad9db83ad7ee86942e4ab7ec9c08a0553f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting suggest a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the PDF and the URL patterns indicate it's likely part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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 http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f754442054---84618830835.pdf In PDF document text
- http://travelport.pl/userfiles//file/10968351429.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a446233bf9c---73240655341.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/fa2d34ca9b9e362feaf8f03aafd98115/79177355957.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dbcc171dc---kisavujemilujuzokimumi.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/d07689a43760cc5d8b86c221e1295434/fofamajifoguvosazesigul.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afae226a653---22291990478.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2e47388d---luduf.pdfIn PDF document text
- http://sluchatka-shop.cz/files/upload/files/bolakagu.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070093da3651---sevimipakobalibiw.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/bbe39aaa6bb73509da7acb045bf3e9f1/80117716219.pdfIn PDF document text
- https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/521247d5350db78432faeb26bff4fdaf/44579976962.pdfIn PDF document text
- https://cplastik.com/data/cms/file/47469007263.pdfIn PDF document text
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/56ba023463c0208bcaa69d5293fdc534/81803191008.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/f15d31a070a58e92ae5b1a695e0ce2b7/51779801364.pdfIn PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/2a94dc8c4af88a7fc663d5ccc660798c/gugiwine.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dbf2946f2---74445385510.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/66n8rvvcokm92e59ep248q5lp4/wekiwanorajak.pdfIn PDF document text
- https://ymvii.com/admin/upload/files/57848215320.pdfIn PDF document text
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/cquc7evvnaot186ef0j6sas271/43849388795.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b56dc861c47---jijajeta.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/50659449758.pdfIn PDF document text
- http://drairtools.com/ckfinder/userfiles/files/97143584037.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/nebupifozofak.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=frankincense+for+blistersPDF link annotation
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f82e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF82E	16944 bytes
SHA-256: `9b1152c1bd7703d7deb3de8d365c80e550cd0e02ef34452b97fb139954befbf2`
`font_01_sfnt_off00012477.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12477	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013c8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C8E	10540 bytes
SHA-256: `8f93f4cf2306d797d8a77e163659fa5f82f3c998e9bbb7af0b414e0bb13759af`

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