Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b25cf1efc0cc21…

MALICIOUS

PDF

81.7 KB Created: 2021-01-24 05:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 77b611e5200e1cef7f55d7658bc01664 SHA-1: 986392d96e48bed6e1a9a88fb77a346bd39b1ef6 SHA-256: c3b25cf1efc0cc21e95a4eedfbeec8566b25f71a94165e91d895dd4bb8f92b82
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that appears to be a lure for downloading a game, which is a common tactic for phishing or malware distribution. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of an external URI further supports this. No scripts were extracted, but the overall structure and embedded URI suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/wb?keyword=faily%20skater%20game%20download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5ffa378245c63.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/mhdBjbw/woodcutting_training_osrs_calculator.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/gul_ahmed_textile_mills_annual_report.pdfIn PDF document text
    • https://site-1256440.mozfiles.com/files/1256440/97918945383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408177/normal_5ffe8e657194e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5ffe26686edf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_5fe903cab2a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5fea1c0c99229.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/ciihiib/sin_pin_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_600b8e19aa4b6.pdfIn PDF document text
    • https://site-1177705.mozfiles.com/files/1177705/goxopo.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/ii4heWw/my_airtel_app_nigeria_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/iifFggU/french_e_with_accent_aigu.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/libusamagowuvo/28072756137.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/72757743618.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_off000103db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 5360 bytes
SHA-256: dd3db66c02710e331b1797ab9be40295db39f5747869ee1e4ebc290abe67bc17
font_01_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 10512 bytes
SHA-256: 6ff148fd58ea12b7f9bd28b836df35faba436f39692146613800714a45fc5388