Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4f3ab2bc1f2fc1…

MALICIOUS

PDF

74.0 KB Created: 2020-12-23 23:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 507508bd0a495456d661969104353a4a SHA-1: 92423fc393ab14a56f3fffc9e9b4f93abeaaf62f SHA-256: 6c4f3ab2bc1f2fc1f61295bdfb1508a7b32ffd2d95739e9328815201c068c0c4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/strik?utm_term=music+making+software+free+download+windows+10 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fc6d69c1ef63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f936eed6ca04.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/sivasidi-turanifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5fad6be53edfa.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/9944119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd6398d9c058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492915/normal_5fcc1c2117233.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/zurovajij/dosizizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfd4274-2db4-466a-b535-b6e29d97a716/71804510954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c49f77-768c-4e3c-a589-dfaec0e99373/16253842374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd97c5fa-5340-42dc-8ace-c16e1283f7b8/the_first_noel_phil_wickham_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2f4cd1-97b8-4810-a848-06392f135981/98049617328.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/draft_horses_working_with_jim.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/kajixofuzif.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/netesalixi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/78286623920.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_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 5696 bytes
SHA-256: 539d41ac57f1e2f28f7645756e7989ff543cf4ff27f4785313f35054f1f266d0
font_01_sfnt_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 10784 bytes
SHA-256: dbf6d1622413c516fa08f8fb8ce41bba1c7d5ef47256f8d9f7d47f0246d3e197

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