Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7192c5c09eab55…

MALICIOUS

PDF

68.6 KB Created: 2020-12-17 00:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5f33cb7571cc4a64889989711175056e SHA-1: ec4bc9d9dda3a296205e2ec08413a944d5361574 SHA-256: 3b7192c5c09eab5577c266f783e019cdcc32e367dffd1f53b046e64d31352fb8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/aws?utm_term=ssat+middle+level+analogies+pdf'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/aws?utm_term=ssat+middle+level+analogies+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_5fb5cfbc731cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5fc54c1d2e892.pdfIn PDF document text
    • https://vekosakebasagi.weebly.com/uploads/1/3/4/7/134743747/laponazeneporuxudo.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/redaba-zuzokerem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/42982106270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a788e5-02e8-4d92-99d8-c2538b3ae021/wajonoletumonufevozupoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/fundamentals_of_python_first_programs_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/zezewasaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51cce8139af03766060b3/t/5fced78db8233e30df9a6db5/1607391117106/empires_puzzles_epic_match_3_itunes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1954caffbf90a66ef50b6/t/5fc599979d793648404e5929/1606785432727/manual_transmission_convertibles_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/basasagusuwofin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98938ac1-7153-4254-b810-ab8175c916c8/cinderbane_gloves_worth_it.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_off0000cf50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF50 5428 bytes
SHA-256: 03e761dca2d9bce2849e1bfce8f0c421c9a5c1a4f0fc6745d6f1e7591db1f965
font_01_sfnt_off0000e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 10444 bytes
SHA-256: fb937fd234806a0da1933018797a2d8c58c7ddfca9e21544ec146429c1061a16

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