Malicious PDF — malware analysis report

Static analysis result for SHA-256 357336c21093a1a9…

MALICIOUS

PDF

75.1 KB Created: 2020-12-31 23:15:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d6137e40199f9d6e7735db7adeacd3c6 SHA-1: ea8577ff42ba32032e0472661da04172ed8d6f24 SHA-256: 357336c21093a1a95ce40b8d60ee2db38951aead3d7df690cbfd57a934238285
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malicious download lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

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://trafffe.ru/strik?utm_term=traffic+tour+apk+mod+andropalace PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f9e3cc97a6a4.pdfIn PDF document text
    • https://cdn.sqhk.co/biwufudi/gcifWjj/kodore.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/h0BUhj7/okay_madam_movie_free_download.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/e1abfd58-3fb8-4d98-8e4b-f535885d4469/papa_s_hot_doggeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1383860-cddd-462a-a349-e2e18e34f193/essentialism_the_disciplined_pursui.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9b2dbc-9a6c-4867-bd08-8fe8c55f4ef9/66684742095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256e2843-d6de-4bc5-a23b-8942e27bf342/dime_unidad_4_leccion_2_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9b205d-d905-415e-8af4-c6117f3e2ec8/cookie_clicker_best_minigames.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069c7433-022b-4f61-98b6-27c4c3b11de6/free_sunday_school_lessons_on_prayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce5e01a-ca21-4063-a534-ef2067e222b5/25317721934.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/machu_picchu_guided_hiking_tours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bd0e06-c541-405c-a784-bb6364a9984c/words_beginning_with_same_letter.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_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 5136 bytes
SHA-256: b9ea2d216dc6752e183d8fd23075ac9eb7319a1145db55957f6e8fdc5ff136c2
font_01_sfnt_off0000f6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B6 14880 bytes
SHA-256: 8cb06f93d4dbee9655494ea1efe571a8301ffee8bc27405569401594a158bae2