Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0a7d8f2fe98bed…

MALICIOUS

PDF

74.7 KB Created: 2021-04-20 10:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dbae6bebb989be72cbeaf2f8c5dd2057 SHA-1: e87d2a856b4368db06055161817bfa7e26c171d1 SHA-256: fb0a7d8f2fe98bed28e96dbdd7bf3b06122be9437717a27b4b06b8e560ca81a5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many of which are to benign-looking documents, but at least one URL, 'https://pelibifir.ru/strik?utm_term=what+is+data+analysis+in+research+pdf', is associated with a phishing attempt. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or redirection mechanism designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=what+is+data+analysis+in+research+pdf PDF link annotation
    • http://wusator.mygamesonline.org/susogisuzowijine.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/coulombic_attraction_pogil_answer_key.pdfIn PDF document text
    • http://judanit.iblogger.org/trumpet_voluntary_john_stanley.pdfIn PDF document text
    • http://jupowawixiz.iblogger.org/49551449732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_c5d8ed9bb88c46649c8e8319e039e732.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7194bb1d-d64a-4b3d-865d-0803f1833e50/1999_jeep_grand_cherokee_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/48134438591.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/free_printable_fortune_teller_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/dobaro.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/17766366496.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_2e0fb3c978104bb3afad1ecb911c7fab.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_b634d19491ff4b7e9ea6448d53f391d8.pdf?index=trueIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_bb15d1d814504d50a00c393d47475b79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0670832-c19f-4f7d-b06c-a5082545fc14/how_to_turn_off_toro_sprinkler_system.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_off0000e5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D3 5360 bytes
SHA-256: 9139a406cb4b61237fb4b649f06e1478699ec4197b52c081da4f346499c78b2f
font_01_sfnt_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 11112 bytes
SHA-256: af9691e72a8eb7621ebcbb13f8254d6b60964b93e33bb43d6ed1f07fcde21059

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