Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da26021e3f28a1f…

MALICIOUS

PDF

72.6 KB Created: 2021-03-13 14:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 759081e2ad7fdacf2d0cda9d7276e06e SHA-1: 20daa348d20bdd526576db950786b7653bffc604 SHA-256: 8da26021e3f28a1fa59ffa9ac17a05eea835cd81317d59255f6444ea16d8d4a1
96 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, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Romeo and Juliet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=romeo+and+juliet+act+2+scene+1+key+quotes PDF link annotation
    • https://cdn.sqhk.co/vabalogu/egijgje/45615722955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_601c78f6aa402.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/hhjnjgb/25089720700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5ffcc824cb683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_60123662ec169.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454303/normal_5ff5fb797e237.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/djjgcUd/lavugusefawebileduvebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_5fd6a9ea50f67.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/JZjcjcN/kiranunavakafazanozina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb88a7f1-79ab-4898-9833-b774a3c91435/kugajumiwitagojelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c663f090-7bb7-43d8-822a-1ff0b8e58219/toto_washlet_remote_control_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf81a8b-a6f5-4228-a3a9-f656b56ca5a5/car_mechanics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50390f34-2334-433d-bd48-216cecb072b2/breckwell_p22_pellet_stove_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adba894f-0283-4ea4-9fcb-6e804816b6cf/home_maintenance_for_dummies_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5256b38e-db1a-4cfa-8a40-0bb2ec0428d4/25590443352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f180a7f-9955-4bfb-9dc5-ed748aac0559/batman_the_dark_knight_returns_comic_book_value.pdfIn PDF document text
    • http://ropasibemufi.epizy.com/37852941049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca721639-6203-479f-af7c-588238e9c567/sufoji.pdfIn PDF document text
    • http://mugevewobota.rf.gd/84973271992.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_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 5548 bytes
SHA-256: 0fdf25beb7ee214ade755f38fca716d2c8b3773f6962b4854f37a9271a4dbe9a
font_01_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 10600 bytes
SHA-256: be05f10567153530bda9d10debefb305ee0f470f748d4d913a96b212e1bced4a

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