Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e6e6b174e753da…

MALICIOUS

PDF

90.7 KB Created: 2021-03-22 04:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bccfce00600d5fecef2a430789fbc0f1 SHA-1: 60e4805e160b8650da7056927f998515cfa167ec SHA-256: 28e6e6b174e753da7bf6c3067058d015f8e0c19da9047154613ea1985d8dbf1c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs points to a resource that appears to be a lure for malicious content distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/award?keyword=the+catechism+of+lucifer+pdf PDF link annotation
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/zumujef.pdfIn PDF document text
    • https://pevufebulole.weebly.com/uploads/1/3/4/3/134351465/4b80014921f9a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_6037991645584.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/barajumaruval_gorakojinoj.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/HidhcV6/warlings_armageddon_hack_version_download.pdfIn PDF document text
    • https://nerisowale.weebly.com/uploads/1/3/1/4/131412290/kazuvujakirexi_rosipulosikoror.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5fe8f7c89be37.pdfIn PDF document text
    • https://cdn.sqhk.co/fanasuzajem/jjs23hh/15914535161.pdfIn PDF document text
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/66f28377bf5742.pdfIn PDF document text
    • https://gipavibipo.weebly.com/uploads/1/3/4/6/134654588/2911090.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/ghhdYhe/banejitoponoboropiwad.pdfIn PDF document text
    • https://cdn.sqhk.co/mafulavet/ibXWCwt/60846836526.pdfIn PDF document text
    • https://kukutapiroboj.weebly.com/uploads/1/3/4/7/134712573/ed3107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492257/normal_603e645947ba7.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/cygg7IS/brimnes_ikea_dresser_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/bgjExKB/ulala_idle_adventure_pc.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/tabole.pdfIn PDF document text
    • https://kuwujuzavasikit.weebly.com/uploads/1/3/5/9/135985591/xowapefekabonigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9163a6-2a80-4163-84e2-fae800e95bdb/70485496790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59bbaa79-8d77-4fa7-86a3-4d249261fab5/53102243661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba731f93-fd7e-4c7b-a8c3-a43b8a68d63c/how_to_clean_your_honeywell_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6608f31-58c1-4725-8a22-06abedc8c85d/86489908692.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12565 5344 bytes
SHA-256: 8374eb9058aab281f9b60db16932f660af88d1989d42f0c071248b8116bf8da4
font_01_sfnt_off00013765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13765 11172 bytes
SHA-256: 20c8b342ab1fa0eeeeb600942419bc9fd8bb1337d234a8fcaf2d2c6489383b3b