Malicious PDF — malware analysis report

Static analysis result for SHA-256 1232b359f81aa188…

MALICIOUS

PDF

73.9 KB Created: 2020-12-26 00:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 925007e476387a214fbc9cdf11bf5d7d SHA-1: 52d3ce50dc23d265e29b3b4b38ed0a339726d6f6 SHA-256: 1232b359f81aa188ad25945732382a58772d2a719c6f86ccaee75268726a97c6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=spectacular+smith+real+name'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=spectacular+smith+real+name
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5fdf217909732.pdf
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fc62d59da3c2.pdf
    • https://cdn-cms.f-static.net/uploads/4450256/normal_5fb80058b0683.pdf
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5fb5a48e71b5d.pdf
    • https://cdn-cms.f-static.net/uploads/4460263/normal_5fb2e8434e9d3.pdf
    • https://cdn-cms.f-static.net/uploads/4409093/normal_5fad922e27671.pdf
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5fa5d7112d36b.pdf
    • https://static.s123-cdn-static.com/uploads/4478387/normal_5fdd1de349a84.pdf
    • https://cdn-cms.f-static.net/uploads/4499329/normal_5fc33b568cabc.pdf
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fb93d7f85409.pdf
    • https://cdn-cms.f-static.net/uploads/4458388/normal_5fbb7ca92cd44.pdf
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fa92d675065b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xaliwalufoguni/word_with_vl.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/cdf_file_format_mass_spectrometry.pdf
    • https://s3.amazonaws.com/fodose/all_in_one_science_class_10_download.pdf
    • https://s3.amazonaws.com/nemafu/80558041860.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_off0000e2d7.bin
cbdec6e4293e1bfe13f1e64a9419c427d99e4c71b8bcad25d6c5c956e3558fd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 5276 bytes
font_01_sfnt_off0000f49c.bin
accbca2d6007a1d43ab393f08dcd48cd61984ffc342dd15ddfa25784e0b33c86
pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 11076 bytes