Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c624ae517ab174e…

MALICIOUS

PDF

72.7 KB Created: 2020-11-26 04:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36e087809eaa06a3a3bf355529c47439 SHA-1: 9830f1d1ca63b319ad28b036319e59f2128ecfaf SHA-256: 0c624ae517ab174ebc652d652cc1c59ebb871192d8359b78298ad574c8e9a284
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=little+light+studios+dvds In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f87bbdd56423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_5fadd232ac710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f9d0fd1c8bd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8838a9b7471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_5f9a5e1c33ffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_5fb4e4a3b8a07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f903b23b236e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_5fabf369c39f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5fa78b1811a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5fa89bd5c1ffa.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://uploads.strikinglycdn.com/files/5225b5eb-70ce-445e-bd9f-3edc87ed1154/87185501169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe9fe1c-f4f7-41f4-a824-41bfb581f1db/80671206616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b59050b-d2de-48de-8fdb-83d637fa5162/86747871271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24ad9b3-74d3-4ae7-917f-510d9ed0d8cc/27926312931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45843df6-555a-4a60-b5f2-15f689d958e9/navy_service_uniform_men.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_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 4560 bytes
SHA-256: 6a7310019392a1fde62158bb88754cdc2b386798f1c8caefda5788811b2144f0
font_01_sfnt_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 10228 bytes
SHA-256: bfa8de5f94432fb35cbbf4697fe5f6f0dbdcc7f81fbcbe9646065a18a0b667cc
font_02_sfnt_off000106ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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