Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13862245a6ed266…

MALICIOUS

PDF

78.7 KB Created: 2020-12-10 21:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f1f4c8fe3699370fc5dd9543d8dbc417 SHA-1: 901c19a8247c08f034d33c7feead882da73b9f63 SHA-256: c13862245a6ed266207757a374d30e466352a6bb8a5155f1e6aef83be6dacb5a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=dubbed+anime+apps+for+android'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=dubbed+anime+apps+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_5f9e542167e9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fcba5b62965e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fafd42b88e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5f9e83392c40f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f872d49b16ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f95376d3830e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478667/normal_5fb72d3fa37d4.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/6426889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f8e7429d85ec.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/wemazun/lavafusutubuluxejemena.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/st_charles_parish_guide_herald.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/abirami_anthathi_pathigam_lyrics_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fdedbb-db7c-4f5b-b7a9-f2b045c57e50/kuxezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e6c8cf-8523-4fe6-a94f-7a3eafb9f07d/xijilexudufuwulutomowuj.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_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 5296 bytes
SHA-256: b328e87a4abe4dfa122b6c873f693b5bc2341c8cbd92f3e54bb34ae546ae74dd
font_01_sfnt_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 11016 bytes
SHA-256: 767123021fe218557df9252bce4ad2e9bdba1bf0489c432a79b6c9d4fb39d284

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