Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9caa76cd6643419…

MALICIOUS

PDF

75.8 KB Created: 2021-02-17 14:08:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f60bfabdb933a8cc9a643ea0c18ffff SHA-1: 8f0959044cb2e9ffb7049c944650b72c80c7333d SHA-256: d9caa76cd66434193940fd3db7de6078b9274d68258887f0eec86709fea7f89a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or use link farms, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers confirm its malicious nature. The embedded URLs suggest the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=remington+700+sps+tactical+distance PDF link annotation
    • https://cdn.sqhk.co/zunezafi/hbibjbq/20018865841.pdfIn PDF document text
    • http://teasmall.space/horizon_zero_dawn_mobile_gameogb7n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fc9ddfa2d4db.pdfIn PDF document text
    • http://richmaya.site/peminowi08rc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423189/normal_5ff8d71b7872d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492250/normal_5fc5725b27834.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/9086324.pdfIn PDF document text
    • https://kazazurijufom.weebly.com/uploads/1/3/0/8/130814205/nuretubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_6021047f10235.pdfIn PDF document text
    • http://file-id.ru/soundmax_audio_driver_for_windows_7_64_bit_free_downloadggwyv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_5fcf40d83c9c8.pdfIn PDF document text
    • http://nature-ital.space/90737406242s5yuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/fJTIiia/video_app_for_android_auto.pdfIn PDF document text
    • https://cdn.sqhk.co/dirotiweze/fjaLjiB/black_friday_deals_tv_55_inch.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/1d211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_6008092bc51cb.pdfIn PDF document text
    • http://svarka-aurora.online/altered_form_giratinathv4h.pdfIn PDF document text
    • https://kisetizep.weebly.com/uploads/1/3/5/9/135992433/namefuzagezef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5fe9ff5d2f0a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 5528 bytes
SHA-256: dc33ae25f77f53a3d8c059f1592f63114081cc0dbf8723437f53a2202a8a0e10
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 10812 bytes
SHA-256: f21812b9de14f50b0c1e7d5c6a0f00d2525009ffdd865cdd3625b3b6bc36b7e0

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