Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2ff080abba543f…

MALICIOUS

PDF

89.1 KB Created: 2021-06-30 05:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d9264bfda33793625dd2cf44639fb62 SHA-1: 626e57d933dee8fbc0ea9c74e844518a1f20f9ce SHA-256: 9f2ff080abba543fbc9161c831bd19577a16e4ead748c476d17b68fbcf7e50ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=plastic+ready+meal+tray+melted+in+oven
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/f0a151d4864872d28092c29de8352772/34502405904.pdf
    • http://www.nomorcantikjoss.com/file/leguse.pdf
    • https://aimhc.com/userfiles/file/90029284338.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076cbec8b367---14254885447.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/69c49e72de2dda0f2c9acf7fb2fa5bfc/lujat.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/84vrg4ed35m9lgg9ck5ip69v55/7114132756.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/91dd315d243dc66ceace8c0a6e4b61cc/99988410301.pdf
    • http://interel-rus.ru/test/sites/default/files/file/nuribofukuxulivuvogaxep.pdf
    • https://sportsht.com/userfiles/file/jopositemofimaxipowa.pdf
    • https://bandai-k.com/userfiles/file/67190850008.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/10065470556094d7a7b15aa.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/31126391012.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/zekixevoxa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c7ee2fd07---lutejevewikaxujoreb.pdf
    • http://bogelaipigeon.com/upload/file/kedojevimamotolovelorip.pdf
    • https://acronimocostanzo.com/userfiles/file/53985343167.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f47f703ff221e6e06c1f520203d8fcae/2628258385.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073362ac7dbe---sepunudapo.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/s801j7mh94a9l5jjem9q5rar2n/letawegimurizuton.pdf
    • http://petrduchek.com/files/41787754542.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608213e744f63---lirezeze.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a01070b74fc---95679474690.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e0.bin
eeb4084fac4f18d4a9f1088e366181369541d6b67b8144faf326c0b3d928273e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E0 17068 bytes
font_01_sfnt_off0001267f.bin
94becf067222a58c1fb812b1b4f71ebbc05ad7090c2fdff830d35a325dd5132c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1267F 10712 bytes
font_02_sfnt_off00013f22.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F22 16792 bytes