Malicious PDF — malware analysis report

Static analysis result for SHA-256 7669af76da6c40e6…

MALICIOUS

PDF

87.6 KB Created: 2021-09-19 18:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33769df95d23c12e6f22c3a63a129e93 SHA-1: a75bf8e093d1a421bcbab8559ed3fccf2b73cac8 SHA-256: 7669af76da6c40e659ce33a34632ecfb7d9d6e41c2e548b9d20f2ec6bbe953fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The document body itself is heavily obfuscated and unreadable, but the heuristics strongly indicate a scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://archism.ru/uplcv?utm_term=watch+get+out+online+free
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd4e005709---27913370126.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-9/file/nijubokosemofu.pdf
    • http://back2wood.de/userfiles/file/kavev.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/cd24gc55647qj8jvq37d3vkjk6/5238254717.pdf
    • http://media-production.net/admin/ckfinder/userfiles/files/57868253594.pdf
    • http://szjwwj.com/userfiles/file///54062433233.pdf
    • https://implantsdentairesdesmoulins.com/upload/editor/file/kidig.pdf
    • http://didopack.com/files/sijakalimosenudamubuwol.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/fc9a086ec63a9734191b49a2515321fc/semerapofanotodomavifemu.pdf
    • http://sunnyten.net/userData/board/file/putisit.pdf
    • http://akicgiyim.com/userfiles/file/funopalokuzalifalilofoto.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16141385c7e157---nivazamodunojo.pdf
    • https://kme.pl/global/app/webroot/uploads/file/16318327598746.pdf
    • http://pensionpoint.cz/userfiles/files/kusasovepidabolexar.pdf
    • http://wangguanhardware.com/userfiles/file/xofodifelinusakesikasura.pdf
    • http://jan-fotografie.nl/upload/files/86048811958.pdf
    • http://testplanet.nl/uploads/files/balobiduzikake.pdf
    • https://truckforceone.eu/upload/editor/file/62450244459.pdf
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/30922081907.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1614448e22a339---xepuferelixodop.pdf
    • http://aaronandanthony.com/userfiles/files/pimeturazesuvof.pdf
    • http://rutka.pl/media/upload/files/d71fdc5c906388a281d85d083464386b.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a4.bin
0738b39cf607da3ca35251cd22721cef8eed953d8253d3a1af236d1887c9abad
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 18860 bytes
font_01_sfnt_off0001211e.bin
98ac6cdc2647da448beaef37e86b3d07b09361f5316ec4ee27a9d615db8a36ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x1211E 10540 bytes
font_02_sfnt_off0001391a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1391A 16792 bytes