Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebfbf45ad659e93…

MALICIOUS

PDF

72.7 KB Created: 2020-12-05 13:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 173aa6b8c824cf66ab9fda4412a2a890 SHA-1: 813a635b672a2379df126f2004dc5ab32583c356 SHA-256: 8ebfbf45ad659e9393b7d46b7926c6015ca9881244ab2bc046f8a7ce35388854
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary suspicious URL pointing to 'trafficel.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/aws?utm_term=report+writing+on+flood+like+situation PDF link annotation
    • https://gajorimimexawi.weebly.com/uploads/1/3/4/4/134458849/ecbb3c69.pdfIn PDF document text
    • https://pimakiwukusa.weebly.com/uploads/1/3/4/7/134712386/94f49648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f99ecc043b4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5252cb8467722f1ef6e04/t/5fc7b2699dfc2a404529393c/1606922857200/47249404625.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5104c9698b02c7f3b6a9a/t/5fc57bbd3570fb44d1bd4a1a/1606777792995/nosaxis.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/wofup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5d3f9b1ed03538d29b9f/1606376767726/5901269431.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/ib_chemistry_kinetics_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe37b89d79364840599c48/1606301627058/where_the_spirit_of_the_lord_is_there_is_liberty_nkjv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30874df132613bbcb9d36/t/5fc59e656457125654fd85e7/1606786662035/bebegolar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3660e8787e879897bde4b/t/5fc748a156cd4459b3b5a1bb/1606895778022/canvas_student_view_grades.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_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 5372 bytes
SHA-256: 638cd322499a5bdead1c706c66d25a80605c09319ae01efe125e0328d4e369e2
font_01_sfnt_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 10352 bytes
SHA-256: 9114fec2989bbd6a74300ee1057214dc66c78d96e6f9e55e9947755083d26cf5

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