Malicious PDF — malware analysis report

Static analysis result for SHA-256 3544b73a32e84203…

MALICIOUS

PDF

91.4 KB Created: 2021-06-17 09:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4ca9780a3c57d6b568d61366f6e70850 SHA-1: eae9d6ced07c7c390414fedbf3d4618c031cfb93 SHA-256: 3544b73a32e84203eab24662bab0dda3ba8602bb668dff60793829b8e0a5ca15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to its creation and a lure referencing a game walkthrough, likely to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://wastran.ru/uplcv?utm_term=ae+mysteries+trapmaker+2+walkthrough PDF link annotation
    • http://ingenermarket.ru/userfiles/lujupiserumozuvelelode.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/gdf14mjc4gnnuhn35icpsogs0q/14590174965.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/98c339468a7371f7b7e6bd5793f442fe/61741186763.pdfIn PDF document text
    • https://aedwea.com/upload/foto/57914695924.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/d32fb68007cd66864265c0cd5c21a197/62828264622.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/71031400906.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/f162d0052c1307fd1d183e01a9cb04c6/gulobagilijemejulikogogib.pdfIn PDF document text
    • https://marigabung.com/contents//files/20102426112.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/1619892375964.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a192a57dc52---neboxezuxika.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607841002a621---mifejomeduwakadefejegi.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/19496871195.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608571bb5986e---pebumifizuneraromorifedob.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/bf8ae2dccc188b51bdc1f566f900d8dd/jusoxesewenubuke.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/ditux.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b93307c5dee---88670833357.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/niwakew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11507 5388 bytes
SHA-256: ac808a16256c027ef4134b28d3254f2663b403d64771256fa32ed2ea7d25df5d
font_01_sfnt_off0001277f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 12648 bytes
SHA-256: 90e80a77d9eea12d2bbe5b67b160f705d69b595902029304db96bfe4af4ef94f
font_02_sfnt_off000150c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378