Malicious PDF — malware analysis report

Static analysis result for SHA-256 394a68aa41b8f4b3…

MALICIOUS

PDF

59.7 KB Created: 2020-11-23 15:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 551a33b5f375f0999efc455b9d2e4ff5 SHA-1: 1eac6e605b33146f9dbc3bea56dacc5654cc02c8 SHA-256: 394a68aa41b8f4b30c34dd8f8ba3806022c76ca495e8a8e4d2bb768f5ae9bd47
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains references to 'Strc 246 transistor' and 'wkhtmltopdf', suggesting a lure to a malicious site disguised as technical information. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious intent, likely to download a secondary payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/strik?utm_term=strc+246+transistor
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8aa190a9011.pdf
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f872513b03c9.pdf
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5f9fa1d2890c0.pdf
    • https://cdn-cms.f-static.net/uploads/4446030/normal_5fa8d76c3042c.pdf
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f9b96d5397ef.pdf
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5f923463297bd.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5fa51acc45872.pdf
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fa153ab5509d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xijalovelokolep/34292838579.pdf
    • https://s3.amazonaws.com/fasanag/xofepewuserev.pdf
    • https://s3.amazonaws.com/sugaguxagu/45415213798.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_off0000aadc.bin
9fb2e9cc582cfb71d21cac971b9a07ca49ba78e246f588e29ca479888ed8e957		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAADC 5236 bytes
font_01_sfnt_off0000bcbd.bin
4a4bb6fec29508462170caa4350513b898f8d0092154cd95f7ab58767ed857ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBD 10428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.