Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea25c22552b6195…

MALICIOUS

PDF

74.8 KB Created: 2021-05-02 22:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 846babcf0da3688a88016915263c3cf0 SHA-1: 16bca54d3b45547687524e8a04f95ded74afc2c0 SHA-256: 7ea25c22552b6195a379715a0620d108bae6213e205f422ec14262399544f6b7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading an ebook. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/strik?utm_term=arnold+schwarzenegger+encyclopedia+of+modern+bodybuilding+ebook+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425256/normal_60466a0a8e218.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jigfvhj/sakitineforuvixu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389355/normal_5fc6cb4143680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_601850f3bae88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_6060a9404a60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_6011737c22d63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369914/normal_600172cb409d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401714/normal_6007b0b500e29.pdfIn PDF document text
    • https://cdn.sqhk.co/bejomewuv/cOidzz6/link_9_dots_with_4_lines.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/JhhJOgj/vitamin_c_deficiency_treatment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_606413ab7090a.pdfIn PDF document text
    • https://cdn.sqhk.co/jewimebobi/QWhfgd4/gubedunapenajekej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_60320e70b4673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_601347dceee2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_605aebeb1cb19.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/mejados/lugegirekupalewise.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/nenak.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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 6008 bytes
SHA-256: 2f6edb093ee285260fbbf9e34eb2c25a126c94cc1b81ec8c53f89430dd547e9c
font_01_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 11672 bytes
SHA-256: 7b5377b0e4afa0ab22c1f54f04407b8a0b271237f5378fd5d2459924b10aacbe

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