Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9af789a7992e81…

MALICIOUS

PDF

70.8 KB Created: 2020-12-11 01:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9086fff3b3d5c2aeedbf50c50cd2e129 SHA-1: 8d12c7581d81b334b7c7101c1d735dd1252b0ee5 SHA-256: 8f9af789a7992e817b6b88ac37703be20c876353b5dcadbce4d804bbaf6c3921
162 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains text suggesting a 'thank you letter' lure, which, combined with the malicious link, points to a phishing or malware distribution attempt.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/strik?utm_term=sample+thank+you+letter+to+my+doctor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_5fad9e2a0634d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f88b1d1475f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_5fca297a9465c.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/8cdd8ba149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f8daf1418932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tizowodifi/anycast_dongle_software.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/faxipojato.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/breamlea_beach_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/anime_gif_live_wallpaper_2_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/new_member_coordinator_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/50851588040.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC90 5240 bytes
SHA-256: 45ddf7d6c1f1bf4e01e2c39ea1e8efeab64cd26c907589ecc5e6786bf9b2f955
font_01_sfnt_off0000de39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE39 10048 bytes
SHA-256: 14a55e5494662c875c0e8f0e69b7f8c8210001d7e6b9ce7ff0c2431aa644a9a6
font_02_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.