Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9d17c66b3dbdc5…

MALICIOUS

PDF

84.1 KB Created: 2021-09-06 10:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8bd8938230cf5de47dd5dfe3e81008ab SHA-1: 60ee8161dca268843d7f25694cc034c60b3c2fe1 SHA-256: be9d17c66b3dbdc5d5475c388a079f95c8476dba7cb5bca4c3c9c9ef174113a5
116 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating a malformed exploit stream. The embedded URL points to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5160

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 http://config.privoxy.org/error-favicon.ico In PDF document text
    • https://www.privoxy.org/In PDF document text
    • http://lizhechem.com/upload/files/nelexixezuvuputerulizuk.pdfIn PDF document text
    • http://config.privoxy.org/show-statusIn PDF document text
    • http://config.privoxy.org/In PDF document text
    • http://config.privoxy.org/show-versionIn PDF document text
    • http://config.privoxy.org/client-tagsIn PDF document text
    • http://config.privoxy.org/show-requestIn PDF document text
    • http://config.privoxy.org/show-url-infoIn PDF document text
    • https://www.privoxy.org/3.0.26/user-manual/In PDF document text
    • https://www.privoxy.org/3.0.26/user-manual/contact.htmlIn PDF document text
    • https://www.privoxy.org/faq/general.html#PARTICIPATEIn PDF document text
    • https://www.privoxy.org/faq/general.html#DONATEIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=logic+iq+test+questions+with+answers+pdfPDF link annotation
    • http://www.w3.org/TR/html4/strict.dtdIn 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

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