Malicious PDF — malware analysis report

Static analysis result for SHA-256 853fa29f643b3711…

MALICIOUS

PDF

71.0 KB Created: 2020-11-13 06:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2d57408f623d6cc38b3f9dae122a98f0 SHA-1: 91dba03ece32301dbf78f977348996d8447d9582 SHA-256: 853fa29f643b3711f0f3d8cc6c3f044eb9d72d26edc07f0ea5a7feffbdd59a09
96 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 embeds external URLs that direct users to attacker-controlled resources. 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-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
  • 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://trafffe.ru/strik?utm_term=chevy+colorado+zr2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fa99ce545065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fa93377b847e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_5f976c711e18b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f9d4f768e9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8806204836c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412908/normal_5f98975b2fc08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_5fa864eb367db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f876129cd64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fab306ad7342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_5f956fc15cbfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_5fa96af1b8a07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8c5f2ce4290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_5f9a95431b3b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_5fad11d1b2488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ninasivol/asphalt_9_money_hack_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/research_capstone_project_teacher_s_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 4768 bytes
SHA-256: 4746f9ae25fbb6e3a60303167dfda92f06cc81d49466435be08f60e97b3ba6fe
font_01_sfnt_off0000ddcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 10316 bytes
SHA-256: 2fb13eb3ffc48c5f5fed6908d55e963f6ac6eabbcc3e6dde5e32f21be6721ee2
font_02_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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