Malicious PDF — malware analysis report

Static analysis result for SHA-256 edff6a40db6e9ac4…

MALICIOUS

PDF

76.8 KB Created: 2020-12-25 09:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76681ee5ca132d7b9bc01ea4b0f6b879 SHA-1: d3ef92cb4db722aca42f7657d4f1e7ae6724491a SHA-256: edff6a40db6e9ac4330b1f56b0fce529ad6aa0ea88380732dc1aed3f4f5d9a4f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to exploit user trust by mimicking search results.

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://traffking.ru/strik?utm_term=ted+talks+topics+addiction+recovery
    • https://cdn.sqhk.co/dadakafopina/iijaJNR/fadunenejuredaxegaloveker.pdf
    • https://cdn-cms.f-static.net/uploads/4528915/normal_5fbff9b543db2.pdf
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fb782cb0fa06.pdf
    • https://kazeroxunixon.weebly.com/uploads/1/3/4/8/134885145/duzidaboberetuz.pdf
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f969013b01ea.pdf
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f93913e4f1b5.pdf
    • https://static.s123-cdn-static.com/uploads/4420240/normal_5fc90ab2b2528.pdf
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f9c2a587e84f.pdf
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/a8d4e119c3b753f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/843fdac1-706c-45da-803f-bbdac5f231f3/the_very_hungry_caterpillar_lesson_plan_preschool.pdf
    • https://s3.amazonaws.com/fojaxexino/rise_of_civilization_android_reddit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f180.bin
0f6683262fc33b8d0426cadb5c8f604b858f25a6423135c7ba48a4c939be0c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 5244 bytes
font_01_sfnt_off00010372.bin
d60c748c4da8b0378e61c7a18728b14dc13e35b9b0dbfebcd35b0da15228cdea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 10404 bytes

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