Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e9f2fe0fe7630e…

MALICIOUS

PDF

62.7 KB Created: 2021-06-16 05:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efb436ac9b6470c1248df05a9a0396d9 SHA-1: 36c435586b30f5ece2af311114e8397625d0d3c7 SHA-256: 98e9f2fe0fe7630e1ee8478742b8d7ce4140f71149601ea25c38fc55ff2bcacb
154 Risk Score

Malware Insights

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

The PDF file contains multiple links pointing to compromised or disposable domains, disguised with a lure of "torque drift money hack". The heuristic firings indicate this is a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8036

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://archism.ru/uplcv?utm_term=torque+drift+money+hack
    • https://electrabicycles.pl/app/webroot/uploads/file/16224420777125.pdf
    • http://sentezetutmerkezi.com/upload/ckfinder/files/80334789820.pdf
    • http://gasthaus-steinkirchen.de/img/editor/file/fevubenoko.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b254b2ffb0---fikokevifiligaxakejol.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b4b25e8599dffcbc026c7ba7e4ce2f3/vexumobitebizazezediladi.pdf
    • https://kildevangen.dk/files/nijuwilorefazuvadelek.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/949b21a17ef2fa1d2d083fc62a92dfb2/betovamoteluxokidizagirad.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada52b4e386---12857735498.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/9b3n08kcj9g2amdlnk4fmnbabd/visamu.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/342aecd2df19c60929cbc06e2bd51b0e/74244265225.pdf
    • https://aslimitada.com/userfiles/file/36639006474.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a92adcfa1---82985089764.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0b456a478---bepupizozatisojumobomumi.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9op77legsi9lmvda95r3al89jl/xewafuxevabem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de10.bin
314f2da10712c481644017b0bf6ba793d9e32d097aedee882ef36cfa072b4340		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 5292 bytes

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