Malicious PDF — malware analysis report

Static analysis result for SHA-256 e852448efc5e2b31…

MALICIOUS

PDF

50.6 KB Created: 2020-12-04 10:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 215236354c2b951974687af196312875 SHA-1: bd38aca8d43fdded249919226825cdd01431a64c SHA-256: e852448efc5e2b31c513ca141a768ccccfd054e9ea9c2c96bd9fff676d66fcc0
154 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, with one identified as a potential phishing lure. ClamAV detection and ML classification strongly indicate malicious intent. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm designed to improve search engine rankings for malicious sites, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9386

Heuristics 4

  • 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
  • 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://trafficel.ru/aws?utm_term=affidavit+template+queensland+magistrates+court
    • https://xikudamoxi.weebly.com/uploads/1/3/4/5/134576601/guxesalaloje_seborolusepor_perogakoxisekip_pajugujezaxa.pdf
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fc2cfc417469.pdf
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5fbb8715e6c54.pdf
    • https://zazukorowoko.weebly.com/uploads/1/3/4/4/134488568/6615702.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc2987e405d5340f3347daf/t/5fc788ddbfb90028be54c1fd/1606912221844/best_slasher_films_streaming.pdf
    • https://uploads.strikinglycdn.com/files/7f26aea6-5b11-4e01-a65f-ca80244941a5/cerebro_de_pan_gratis.pdf
    • https://uploads.strikinglycdn.com/files/5c4c70ca-e3f4-4dcc-8cbf-06c2a20b0544/dumaferemexapejigomap.pdf
    • https://s3.amazonaws.com/nokiwovowus/how_to_become_a_shaman.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0a7c79c08c7f2ba09c59/1606224509698/biosphere_worksheet_high_school.pdf
    • https://uploads.strikinglycdn.com/files/c76aaa1b-0cc2-4e3f-a935-6d87504f6bdd/civil_war_causes_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/8437d42a-ae53-4c2b-9c1e-1185023f7707/judy_brady_i_want_a_wife_citation.pdf
    • https://static1.squarespace.com/static/5fc2a071b8467722f1df3648/t/5fc8397a90a4f8549d706cc5/1606957435236/70488218439.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/roriresanaje.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b551.bin
7e3889f6b4c7df822abf150a07f85359cc6c89c4ff8d12a1241d6764c13d45ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB551 5652 bytes

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