Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f045c9cf8c7ea0f…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 16:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 453561b6b8e6505f24b1147fbf45957c SHA-1: 704ce15f7122719862cdf371f7fb7b51ebf2ca4f SHA-256: 6f045c9cf8c7ea0f321f6a508dc191e3211fbef1711c749bce0d2313672b6536
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that form a link farm, directing users to various compromised websites. The presence of ClamAV detection and ML classification strongly indicates malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it is part of a campaign to lure victims through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=blank+index+page+pdf PDF link annotation
    • http://canadanur.com/resimler/files/45385069524.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/6fk3m2fj8haflfe6jvudafj1dr/bepatewadovijoz.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f4aa2fbb3---kipale.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161111207a8805---89328945776.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073229f8526a---rimasowutarumabup.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/31228345744.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a3b75fb319d3d4f13241e4bc83457116/35505853439.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/14878114805.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/nupovosuvabamisuzabim.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084617e93bd9---mipadimijoxapubafafetib.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210821045858.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/c82253c20958741e189585fabda54fcc/ribanefaralomelaf.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/93726760591.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/33810257797.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611d1c62a83ec---85225277824.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ngnsgocseu8ofq89qdm10p2er6/37793562198.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/2674970710.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f64de451e1---98215990599.pdfIn PDF document text
    • http://aweibel.com/Photo/file/soxefusorax.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ao4vs6b2h5747tlovu6l7f0ac6/pekirevekexeluzelexeb.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/87886916714.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/zuxesaponom.pdfIn PDF document text
    • https://iohrp.org/f_files/files/94199590173.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/gusukododasevizoru.pdfIn PDF document text
    • http://ccsl.asia/files/lazibakenigakax.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_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 17380 bytes
SHA-256: 528eb4dfe582fc62d118a4fcb6ea3ea41319833846879b77f3853c596b4f344c
font_01_sfnt_off00010ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 10436 bytes
SHA-256: 20f4853e23de1ca6f61259948db429e0fb17966b27bb533e6363fd07bcad8c40

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