Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a22644340497a8…

MALICIOUS

PDF

65.8 KB Created: 2020-11-24 05:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7cb4ef4c9b19d50cce93519ab137686f SHA-1: 94acb0484bdba851d44b7f0b10788c42fb17c0cb SHA-256: 41a22644340497a8212da343d33054fd84a6de945fe0d96e6fa651b523d7c3e8
104 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicating it is malicious, specifically flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'Sig sauer bdx manual'. The presence of an external URI points to a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=sig+sauer+bdx+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423442/normal_5f9b98fe501eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5fa8bd2529b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_5f9936978f63a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8daf982b3dc.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/bulozor/94989400427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234eea4a-be9a-4a6f-9ad1-f53afc66a2cf/mikemupelelan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cc0e8d-d08e-4732-84de-6f8674909b4c/ginidatosolifubemapa.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/vevo_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/pharmacy_clinical_coordinator_s_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/kidney_function_with_ms.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/practical_palmistry_saint_germain.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_off0000c63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63C 5456 bytes
SHA-256: 461d5e1588ca57d9c0e3d9bd9efdbb06917cd787407224d83e3267bb08837db8
font_01_sfnt_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 10084 bytes
SHA-256: 95f482c7a80a2a13a4120e65fd6bc5e13a4db09193d2c0a54f788b25e2a36b9e