Malicious PDF — malware analysis report

Static analysis result for SHA-256 567e01551c8f8027…

MALICIOUS

PDF

78.9 KB Created: 2021-06-28 05:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b676d12498d2f82de7be0958f477859d SHA-1: 17b36d77d5281f3a2dff4ef4b4cc73ebc5be72b6 SHA-256: 567e01551c8f80274123a51233b73a3fefffd4db8be5f5464785a6d873a06d1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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 http://cesishotel.lv/res/wysiwyg/file/muvupugu.pdf
    • https://sayurhijau.com/contents//files/13572960271.pdf
    • https://langestrand.se/anvandarbilder/204/files/54464326796.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cbdf024e8---difotetitupapexijupemuvu.pdf
    • http://rilta.net/userfiles/files/7019204556.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85c3a23bd3---37956430272.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607568c06f2de---10450678428.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/uumnh9r1t0un0eq3k9jfrdd2v4/vikutifotadoviwubafum.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/a98h59668h3lmccu30sl7v5387/47152757251.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e81a0b5529---15959559569.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/134d68071454c7c4e335dd30bc2a52c4/jelagezawu.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/7e5333d2342f25e581f7fda717698ef9/borumujoliroto.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f7b104819---xeviz.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/kt5j53v741ku7kftn59tn75d15/98590651891.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3362a34cf8---momasemisen.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ca56c4c3b---daboludanapexufiduxixet.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088197293bbd---zonivemotinuruxaxupe.pdf
    • http://capital96.com/userfiles/file/7912377312.pdf
    • https://spacio.hk/attachment/file/353241844.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/1ib1e2ceqm9d6es8lkl9n2nvni/kalunew.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/f530e79df11609125614b205cb4e2880/vakinagor.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=physical+geology+15th+edition+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_off0000d198.bin
bc6a4fd4f96d30d450912a55b82bfbdf8007f4e391436342fca3384e16723b22
pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 16552 bytes
font_01_sfnt_off0000fccc.bin
c0c089ec60b030a672a918cead857b83456937cca5ebdde967e7d1fa85ea057b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 11100 bytes
font_02_sfnt_off00011694.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 16792 bytes