Malicious PDF — malware analysis report

Static analysis result for SHA-256 914e968076adf23e…

MALICIOUS

PDF

98.3 KB Created: 2021-06-26 20:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1a830acbada4f8b4d2ecbfa2e297fc0 SHA-1: 13329f519e12b1e592e82bc6d5f7b2998a3b60ac SHA-256: 914e968076adf23e200eaf28b535d4442ee857a9eb8964dca10a3600fa594de5
196 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' in some URLs indicates a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://pistant.ru/uplcv?utm_term=permutations+and+combinations+extra+questions
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/eaf1bad6c8ce46e5cd8b23157975354c/90261784852.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608dadcd620db---32506820936.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a04973cbf00307848d56a4d7b76800e6/90930392078.pdf
    • http://kleiberit.ru/files/file/zuboragaretibe.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/1cfl08ihln1aeok46lpb1amret/86231355110.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/foxizibenipusamelejode.pdf
    • http://jinanxintiandi.com/userfiles/files/49293364836.pdf
    • http://msinziniering.com/userfiles/file/75163539537.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/4pf1g9lb893lnj9cq8vv0o9fjp/45018379803.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/5hlh8hnanqk8nv6cmd49rtvau3/denodipanazepimotovutogom.pdf
    • https://infoenergie-loire.org/userfiles/file/2857021543.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ca358428233919841a3800ab26af3a0/98696909216.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/h6vppink879uq8pda92p53hd1n/zogafevixirasepa.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/06db0bed06d604b9df102714dda24bb9/zoxaze.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac62df70f8f---lutagakojegidoferavav.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a4cdfe5d922a6620a551e960c2e3a8a7/52973535246.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b7b3bbc4---xikebovuxikakonolajor.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/18fa22e4a9edc6ca0df98cb99d0de4c7/lusefativowebixegiwiwofig.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/38179254748.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ea262b6923406b6c5ce95e2954e5d068/tavevizukazamemepevenoru.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16093c902ab2cf---2563586125.pdf
    • http://studiodrago.eu/userfiles/files/gaduvoxe.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/772b457e9178a0209c1a5a4a25c1f295/2005248712.pdf
    • http://maychamsocda.vn/images/userfiles/file/53842650719.pdf
    • https://infoenergi
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010412.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 16088 bytes
font_01_sfnt_off00011948.bin
0fd6ac9e46c17afeee15cc500da549d8047cad29ab2493234a72cd1f997f3c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 10976 bytes
font_02_sfnt_off0001328e.bin
8e8df54b34fa42c74ba1b405160c5df260ce23827bb293c5b2a17786c36f5af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1328E 18452 bytes
font_03_sfnt_off000162f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162F8 16792 bytes

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