Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6498cf2e028462…

MALICIOUS

PDF

88.8 KB Created: 2021-08-06 13:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: efef2329b6de74ba33d579f1cc73da3f SHA-1: 41b7bc0436a5876b4e018db6e07068e183d1fbc7 SHA-256: 1f6498cf2e028462c3a8543d592af8e4ea06332405d5aae61df45febcc07b3fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=can+the+85w+charger+be+used+with+macbook+13 PDF link annotation
    • http://deshdunya.com/blogimage/file/fevebekaludezevezo.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/1420ab2f442eaff56ed1531959326ea5/votolojutevejupesitujapu.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/fuwazaram.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16088737c7fc61---46226231131.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d13276236becc39c1f10e3906672c818/zalekowisojup.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/179c0fc793e35f1b24905f4530646290/28528867898.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c20d168da---5982118017.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160946bc52ff9b---27843174771.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/49784977820.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a5da65f0---19876912132.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d8ee771dc---defanimi.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/53123165757.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/velejadosevekemenudepime.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090cc0818c32---57519473117.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc4247d569---fujipufetuxilelajawik.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/pal6ceunr3djfn6v8if1kqn49q/semejorikilerozax.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/rizogidukajunujolu.pdfIn PDF document text
    • http://asvpp.fr/pdf/vikiwosudazegon.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/48983212675.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/40927655800.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///fikadagakujowamawugaru.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c14a18180---8803472880.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/15529356710.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/2psuggjd9vcaq2dnqdsb2oohc1/bilitawefutonunup.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3f7621e0---77270801317.pdfIn 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://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.

FilenameKindSourceSize
font_00_sfnt_off0000f2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 17356 bytes
SHA-256: d13b0e6e60daaf8d9882b257a1408b76375eb343e8e42c8f0c3741b550c20076
font_02_sfnt_off000137db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DB 11788 bytes
SHA-256: 4025d814087761ab8f080f4b81f855744d21e93aa044fbd393c84cf41ea3c82b