Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7df572209866fd5…

MALICIOUS

PDF

72.1 KB Created: 2020-12-19 16:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 24ff3d39f0910129683ada2d37fd1047 SHA-1: 0d340ea84daad19a02e2186d65d5eb2b07cbf24a SHA-256: c7df572209866fd5c26c7242b82d849cd9ed364209f26c284e8b1bce59b5528a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to fitness, likely a lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect the user to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=hardgainers+guide+to+building+muscle In PDF document text
    • https://static.s123-cdn-static.com/uploads/4474734/normal_5fcf4205c5ebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5f8db33e088fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fd88f8c1dce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5f9a1931e60ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f9481d2dab0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fd0b76e04452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407818/normal_5fc36c9f3815c.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/vitelitubovuluj/87387275197.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec6c8787e879896c16ae/t/5fc948f197a6c26aa4d3c23d/1607026929493/baseball_9_innings_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfcb71972c46e3c6559c3/1606286524056/finral_x_vanessa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2b976394b41d6424bdfb/t/5fddaa4a7185ee572d372e98/1608362577761/xoboxegodojaxojixew.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/human_skeleton_unscramble_worksheet.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_off0000dc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC01 5360 bytes
SHA-256: d9349acd1623f5345a9afa4cfb2ee808a009cbdb5381bd64d2663ae7033c6d57
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 10368 bytes
SHA-256: 7be0591751da2687b4116216760af0a4e4a963b0beb7fd428ff6023b13754038

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