Malicious PDF — malware analysis report

Static analysis result for SHA-256 12590c1b1f9c028d…

MALICIOUS

PDF

62.9 KB Created: 2021-04-19 11:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2815f87442e17d517f71eb23b8c6b6d5 SHA-1: 3b1115e21182b559d610b221d5ebcb61bb8b0865 SHA-256: 12590c1b1f9c028de990493abe031870516e25e2f7d4b5a2c195c77c5e3335fd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links disguised as search results, a common tactic for phishing or redirecting users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8474

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.pharoxglobal.com/sites/default/files/webform/zomufajiwadusepa.pdf
    • https://www.jwico.com/sites/default/files/webform/koxajupenukolipidawikopi.pdf
    • https://aboss.by/sites/default/files/webform/80384466065.pdf
    • https://aboss.by/sites/default/files/webform/89266631471.pdf
    • https://www.a1touchsolution.nl/sites/default/files/95216779236.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/72246142748.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/dutaberapowuniz.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/nutuzisujobipusife.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/42282539280.pdf
    • https://www.mainephilanthropy.org/sites/default/files/ziladiweropisikiforab.pdf
    • https://web.liderpapel.com/sites/default/files/webform/21411595718.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/tojawi.pdf
    • https://ambrose.edu/sites/default/files/webform/54125375098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=are+victa+lawn+mowers+any+good
    • https://minorsoncampus.princeton.edu/system/files/webform/fujixedapilevunagujos.pdf
    • https://community.princeton.edu/system/files/webform/42655509772.pdf
    • https://community.princeton.edu/system/files/webform/setokan.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17a.bin
ecd990d7527c9ff316ba56079745065382e390c297bac246267446e5deccb9cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 5500 bytes

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