Malicious PDF — malware analysis report

Static analysis result for SHA-256 e984dea0f6bf340d…

MALICIOUS

PDF

73.0 KB Created: 2021-01-12 10:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e54e14e95d36c8c9f768b13087025aec SHA-1: e7ef53cb4cc661794a2c53c649a4c6bd090e60e5 SHA-256: e984dea0f6bf340d6e909f82467552ec9f81c319e569909759aceba2904cae90
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 'traffmen.ru'. The embedded URL, when reconstructed, is 'https://traffmen.ru/123?utm_term=big+brother+live+feeds+free+trial', which is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly indicated maliciousness.

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://traffmen.ru/123?utm_term=big+brother+live+feeds+free+trial In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f94a0d83c704.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/ykjEUhd/slide_away_video_with_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476429/normal_5fe79c1d60fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fd0d3af0adb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5fee7f3e55b21.pdfIn PDF document text
    • https://site-1195783.mozfiles.com/files/1195783/gatwick_airport_strike_10th_august.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/BpdjexE/giposonoduserusisitabigob.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/betefowubevat/zisanudodeves.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/49695300417.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/motor_vehicle_tax_exemption_form.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/25152615776.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/pyxis_medstation_es_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/fox_13_news_traffic_reporter.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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 5420 bytes
SHA-256: 035e196cfa3dee0ae39eb001dff44a3fecb2882c10377e65041ffb591dc65c3f
font_01_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 11176 bytes
SHA-256: 6c01129f2206c1e3e1dfc7b3828c1abb8b1835151e8f81fb1a51719a5ea8e1f3