PDF malware analysis — malicious · afb30d43ea6299f6

MALICIOUS

PDF

83.4 KB Created: 2021-09-19 13:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 36310c13b5c4ce3183472d60a69e8349 SHA-1: 863f1a969c387316cc7d9736438be23ecf72fd01 SHA-256: afb30d43ea6299f64ca3543babab5acedcbd0e47220133a9171464a5935abce5

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which are hosted on suspicious domains. A critical heuristic indicates a 'Clipboard command execution lure,' suggesting the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. The presence of these indicators strongly suggests a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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
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
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 https://xetnghiemadndanang.com/upload/userfiles/files/50612380977.pdf In PDF document text
- https://mhreng.com/userfiles/file/36734815208.pdfIn PDF document text
- https://infotechloyalty.com/bot/ckfinder/uf/files/94915842573.pdfIn PDF document text
- http://hotelbasantresidency.com/uploads/debobax.pdfIn PDF document text
- http://nissanotogovap.vn/uploads/images/files/35647967738.pdfIn PDF document text
- http://ohadalegistrocbarter.com/ckeditor/uploads/files/vebewojijorimitiguxabow.pdfIn PDF document text
- http://le-bouquet.be/userfiles/files/16655191320.pdfIn PDF document text
- http://ukrainski-rosyjski.pl/userfiles/file/34806551038.pdfIn PDF document text
- http://paolacaone.eu/userfiles/files/85781333420.pdfIn PDF document text
- http://shepardinteriordesign.com/rw/upload/file/satatakurisu.pdfIn PDF document text
- http://printific.com/images/contentimages/files/42451604386.pdfIn PDF document text
- http://wernitznigg.at/files/91862325198.pdfIn PDF document text
- http://lachambredechos.com/userfiles/file/nifizemik.pdfIn PDF document text
- http://sirindhorn.net/upload/File/52199100727.pdfIn PDF document text
- http://teknis.it/userfiles/files/bukepovugukazi.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/29094239742.pdfIn PDF document text
- https://tims.ro/ckfinder/userfiles/files/difipa.pdfIn PDF document text
- https://mercerapparelss.com/userfiles/files/73636532915.pdfIn PDF document text
- https://santechnikosdarbai.lt/images/files/12481836855.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3fh2rc1gluvksd9sgptak45oj5/mutenesopo.pdfIn PDF document text
- http://mirai-kankyo.com/userfiles/files/kexapuzubenen.pdfIn PDF document text
- http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/jaratemusogezoji.pdfIn PDF document text
- http://smirna.pl/files/file/vobedazipuberepopegekej.pdfIn PDF document text
- https://hantverkarenisandby.se/UserFiles/files/nulusefu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+install+apk+on+android+tvPDF 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_off0000df8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF8C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f79e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF79E	18540 bytes
SHA-256: `7d1df885507886dc84001c660fa776ed95fa9a67fd61cae78f3ecb08bf30b189`
`font_02_sfnt_off00012842.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12842	10488 bytes
SHA-256: `8be7de985e5d4e4c2e9bdefcc828f3edb907cd9970578f10ef8a383df2eacf9b`

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