Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8683d975245323…

MALICIOUS

PDF

70.7 KB Created: 2020-12-23 23:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a3540a6fb25b373e0978395060f80398 SHA-1: 96e18ab23bdeaceb562713b979f03b41d1b635eb SHA-256: fe8683d975245323f39615ba22239223eaaa40f811af376beff2ec3efe3ac06b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary focus on directing users to 'traffine.ru' for 'las vegas casino slots play for free', suggesting a phishing or gambling scam lure. The presence of multiple links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?utm_term=las+vegas+casino+slots+play+for+free PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/60e5cde918f7b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459469/normal_5fcbd75a53b1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fd077c886413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fb41c2771c52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f8a6b0d3ab3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5fbccba993c95.pdfIn PDF document text
    • https://debegibur.weebly.com/uploads/1/3/4/3/134308456/447c22310d6b.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/MwXQyji/80796793340.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/vunekuvalolu-divipesu-sigavovurivuze.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesumor/CU8qifS/electrical_circuit_design_software_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/RNsxEsY/71820560051.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/5629994.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/napisakaluja/carnitina_suplemento_deportivo.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/great_gatsby_analysis_questions_and_answers.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_off0000d6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 5288 bytes
SHA-256: 5eca60606393bd2167cde2c325a5a016e2cf6418df7a93865851e71592bdd6ed
font_01_sfnt_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 10964 bytes
SHA-256: af6813f826a83d3163683ee21c043fa935a78be5e81223ea36fbac294445bb15

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