Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d747706f3e7b4bd…

MALICIOUS

PDF

74.0 KB Created: 2021-06-18 04:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f265de0866b686619616fe5f0c63ed9 SHA-1: 204223ea7a37033140597b4d1859fc1e20d1dc12 SHA-256: 6d747706f3e7b4bdbb59794b11baad34bb69fcdc8c4c127c9ed82dfb85896cb2
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It employs SEO poisoning and hosts download links on compromised WordPress sites, aiming to trick users into downloading further malicious content. The embedded URLs suggest a pattern of distributing malware disguised as legitimate files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://queure.ru/uplcv?utm_term=the+cosmic+perspective+pdf+download+free
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/0c0c0c81243efb401ea60b40911ccb9e/44457125873.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b42d8f65---23470683302.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/fj040id4na46n431dug03ajje0/zopafinaxirezusoregolij.pdf
    • http://odnoklassniki-files.ru/images/uploads/files/fuxisenoxolixuputaga.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcf0d0ebc0---kuzumumadaxotanufa.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4a2f7235b---34166584138.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606e085e18e60---nawudodetapumudo.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd17c75e38---51619858150.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/81510463692.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/9f615269e48d98810691d18837d7a4e3/gabawiba.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b035913f2---28389857103.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/23c8f7e6a2f192ab31f3dbd17266dac2/ratula.pdf
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/jugerun.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1aa679437---21054496850.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e455.bin
0a8753a7295ffc46e53a23680f92535227681902aed3d83fb3ca4c9e86b2817c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 5496 bytes
font_01_sfnt_off0000f6f1.bin
cefc25b29b34b5123c376888f59e298298189f494a293f9f2176f873965a4d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 10628 bytes