Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc052181c70a959…

MALICIOUS

PDF

74.8 KB Created: 2021-05-17 07:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bff499ccf05dcb79956bd625a468f4f SHA-1: 226ac1712336c3ce16384e7dd8a60ddfcb491fb5 SHA-256: 2dc052181c70a95924585d12f265fdd5e8acf92d2dbe7142fae9ff77fd99a7f5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://jacksth.ru/strik?utm_term=warhammer+40k+codex+adeptus+astartes+pdf', indicates a lure related to Warhammer 40k, likely to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=warhammer+40k+codex+adeptus+astartes+pdf
    • https://popakute.weebly.com/uploads/1/3/4/8/134863009/nimarorewobub_wufesanaz.pdf
    • https://cdn-cms.f-static.net/uploads/4478669/normal_602daf21b5136.pdf
    • https://rubopawine.weebly.com/uploads/1/3/1/0/131070645/7006069.pdf
    • https://cdn-cms.f-static.net/uploads/4449777/normal_6026bf4a86171.pdf
    • https://rulewosiziruzo.weebly.com/uploads/1/3/0/7/130739522/92e62876dd3a.pdf
    • https://rakazukubuzabi.weebly.com/uploads/1/3/4/7/134736781/2028561.pdf
    • https://mixogefok.weebly.com/uploads/1/3/4/5/134587058/15d9ad02.pdf
    • https://cdn-cms.f-static.net/uploads/4453336/normal_60139db1169e7.pdf
    • https://cdn-cms.f-static.net/uploads/4368760/normal_601983b293b89.pdf
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/naxalejerixuforawaf.pdf
    • https://pujumisetuwu.weebly.com/uploads/1/3/4/5/134576336/xididiwo_toxinisav_mefewozikuw_ketek.pdf
    • https://cdn-cms.f-static.net/uploads/4487007/normal_601da838b667b.pdf
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/womekunol-kasoza-jejage-mipiwewewir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mefovu/bootstrap_dropdown_form_size.pdf
    • https://s3.amazonaws.com/mesotodimus/wajebarepi.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/weber_grill_grates_spirit_e_310.pdf
    • https://s3.amazonaws.com/xeruxaxer/liverpool_live_match_report.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e121.bin
2ca15529242c7e24fcf703de7c2d5a9b3853177f2f039337093509d7567bfb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 5736 bytes
font_01_sfnt_off0000f495.bin
63152200deb822fb28d124fa021196b604d30662998a36126c346a061cf22be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 13032 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.