Malicious PDF — malware analysis report

Static analysis result for SHA-256 644a269eb29aa67e…

MALICIOUS

PDF

88.3 KB Created: 2021-01-04 04:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0346b65af8f6f8a1d201a5180750bd2f SHA-1: d0313ed5eccf01a24475e6a506e52c3441c43a39 SHA-256: 644a269eb29aa67e5dbc6b915573c4baa7fd42b64af365b2ea9575f200656d0a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=john+dies+at+the+end+book+pdf In PDF document text
    • https://cdn.sqhk.co/rinilafexowi/41hdQtS/55688910941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f91ee939a61a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5fa18f5525869.pdfIn PDF document text
    • https://cdn.sqhk.co/niwuruba/jahcfgc/54446161908.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/z7vibz1/5_pin_bowling_kingston_ontario.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f8e96057842d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_5fd3158ec814e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499935/normal_5fe285e5d5f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5fa8af5c79f65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fe615a775a17.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/q1jihiZ/7286773863.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/nuruvapozixix/wijunolidurun.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/programmatically_annotate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df97c31a-eac4-402d-a7bb-e8d22be9d6b9/98328844702.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_off00011eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEB 5196 bytes
SHA-256: 6298c0586a1d12bf92e7587851499f5e8e3ebe1728eee4e9035e61677de164be
font_01_sfnt_off0001308f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 10436 bytes
SHA-256: 276e07831a599f14214fdff4540ccc42222ad73aacd0a99e0cad8a25b90a553b

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