Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dea6422ef844b7…

MALICIOUS

PDF

76.7 KB Created: 2020-12-26 06:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7f532ea6e2f415336d29f52bb997399e SHA-1: 4e0e7badb9f8f5f72e32625105534f290df72c8d SHA-256: 32dea6422ef844b7b2e9e6b4cefc9136e4650db420dbcd6b58e87506a0731733
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting a phishing or content-luring attack vector.

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=instagram+captions+for+guys PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5fbf5c60ea019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458839/normal_5fca5175540ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fe18a51b2ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fd2836e26b8a.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/gazitif/nisamasuxobutatiropozutis.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/lymphadenopathy_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/tegazud.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/govafuxowomazed.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/animania_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/camera_360_for_pc_laptop_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/capitulo_2a_answers_page_30.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/30433442363.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/kerupowofujapik.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/special_gifts_for_friendship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a89c82-3ca8-4cf8-a4ac-c20f6ae2b68b/54663841241.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_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 5340 bytes
SHA-256: 6b18862cbbff9a4e85aa8de785b3829a6a7fae29e30ed4a63ba364c9f8ad8180
font_01_sfnt_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 10172 bytes
SHA-256: e0bc474b7464492c4576e972517484094ccee406548a3ade51b04f7139a75a32

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