Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaba3fc4813d5499…

MALICIOUS

PDF

73.8 KB Created: 2020-11-22 11:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44f0e9ebe0a08876468ac5171be4c5a4 SHA-1: 93174b35ebc5d7a800a15a446e6ec548774a3f10 SHA-256: aaba3fc4813d54991c5cafa96843a02519f02168d997439ae0a9222f2b2e5e2a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded content, though heavily obfuscated, suggests a lure related to shipping payments. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a phishing document to redirect users to malicious sites.

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://cctraff.ru/123?utm_term=just+pay+shipping+sites In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5fa619477f1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_5fb6b3f2227d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5f9728130866d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_5fa3590ab0ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f93238e27342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5fb9f5cc7cdb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f943b3b5156e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f8e025cc6a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f87181e1c56e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_5faaf4eddb671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_5faba297af13c.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/kefefetafij/wupezusiwim.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_off0000d640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 4816 bytes
SHA-256: d4499ba06be564c5cb83881789fbbb81d3e883362b8a1704b074303f02fb908c
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 11264 bytes
SHA-256: e2cf842b92da9a82ca480352bc4861c056e7626987ed4aa71d3c968985dee620
font_02_sfnt_off00010ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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