Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6800a9da7561d0…

MALICIOUS

PDF

66.4 KB Created: 2021-06-01 19:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd5215d3e0968c2d58d14ce3a0a3997 SHA-1: e4d9fbfe1a6aed2ff04bea5d8b1c4e9c5c89b40c SHA-256: ae6800a9da7561d095108c2d604e09071c97487685ab3e851af94f03d4eb43b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains a link farm pointing to compromised WordPress sites, likely serving as a lure for users to download further malicious content. The presence of 'cmdkv3b9has3/nemesunanenewujawixuzonob.pdf' in the document text suggests an attempt to execute commands or disguise a malicious file path.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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
  • 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
  • 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 http://stlnsk.ru/uploads/file/18882030224.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/5seov44p09jqd3goglnv521bf4/82441846818.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2702f383d6---xaresiti.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/39ad80cad4805e173790829b94a06ff5/vijabijavixafo.pdf
    • https://ancoraeducacion.com/images/giletimu.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e55f909a69---rimexarinazoka.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a1b870007---6847702544.pdf
    • https://www.alapan.org/fckimages/file/99353624888.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/d2o9kae5v62p6lhdleonqhg3m4/daterarego.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080675742675---10848959467.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a4be92670d0---waxoxosumi.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a85b2979d25---pexune.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609675df7f816---84788428558.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/b3c514385e7992ff325a211896cad342/pudutelalorikokagadi.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608231e34a785---82684357205.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3a418548c3e2315636a3c2ce6dec4334/rawulat.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/a8kt4q411on1nvcmdkv3b9has3/nemesunanenewujawixuzonob.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/fbd3ef3bb4b4498cb5413a592d984346/82353847103.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=apple+iphone+6s+plus+manual+download
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d006.bin
76c3a7eaf04675c6fa46e7caae5dc1c89d349226bf7b16b36c62e701945323b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 5336 bytes
font_01_sfnt_off0000e20f.bin
87931d5c620dfd02a59b25c59ef87f0ac940b7207c8d17ad8c190146dc87a4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 16928 bytes

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