Malicious PDF — malware analysis report

Static analysis result for SHA-256 775878482488cfda…

MALICIOUS

PDF

75.9 KB Created: 2020-12-18 05:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 45114c168b4ce692a6e25f85233bbbc8 SHA-1: 17dae70fb42c2a4a9180dc17d3b407cf3f1f7c20 SHA-256: 775878482488cfdaa75c688efdd2f899501e492ddaa2fcb73e94afe633ac7287
154 Risk Score

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=adblock+dla+chrome+android'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain text related to 'Adblock dla chrome android', reinforcing the phishing lure.

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://gettraff.ru/aws?utm_term=adblock+dla+chrome+android In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5fc7a758022e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5fc1511e42264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_5fbcb8f854e0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_5f8d456f18271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464850/normal_5fa806f825de5.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/78e32c71-92f2-4062-b93c-456c935d9980/best_hardwood_floor_cleaner_machine_rental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570f81e9-cdb3-4992-8141-6a923881fc2c/nerunubos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b532b8b1-724a-4a08-9491-0b232270ab77/42490787208.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe13ab4f98375720a82c3d/1606292396821/nojanewuxejusupixamazekar.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/95415868426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1482f8f-8fa7-464e-9d73-105895a3bb23/suqah_slayer_task_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7466585-1055-4e98-90fd-779728ec3390/jaxege.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/farhang_e_asifiya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa357543-9711-4ce9-b5f9-2ee7cd9bd935/nizejeburubokirenavup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc0f7d03485235c86e9171e/1606481872678/30911673927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb64fc1-682c-409a-96e9-88d16eb52c29/19876476795.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_off0000dbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 4904 bytes
SHA-256: 7c94c3765ed050b4651f89a311ddb52986d37649fc617f746601b6faee469820
font_01_sfnt_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 14096 bytes
SHA-256: 4e138438607607f37cc618386fc8c92242c22e2b779ba97791a7700e0b8c2f86
font_02_sfnt_off00011460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11460 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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