Malicious PDF — malware analysis report

Static analysis result for SHA-256 096733bc2074048e…

MALICIOUS

PDF

77.0 KB Created: 2021-03-14 22:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f8e6329b784b49e0715e83387e66c801 SHA-1: c5114ce5e3679dc13528cacd47447a36a5d3c80b SHA-256: 096733bc2074048e9c307ae7cc81e1d0f538562641bc571e34210c3b0ab5769d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/award?keyword=free+autumn+word+search+pdf'. This URL is presented as a free word search PDF, indicating a phishing or scam attempt. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://yafferge.ru/award?keyword=free+autumn+word+search+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_60481587600e6.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/fjvOhjI/59912648235.pdfIn PDF document text
    • https://cdn.sqhk.co/lepapina/dTjhYcf/bcit_west_genesis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_600f44be06bef.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/fjclhi7/tiny_village_albuquerque.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/cUcra9z/mamizufukemurut.pdfIn PDF document text
    • http://penageli.getenjoyment.net/hp_officejet_pro_l7680_printhead_problem.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://uploads.strikinglycdn.com/files/2a0b2465-1408-4004-b579-0e0280a5dd79/are_gluten_free_products_better_for_diabetics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf53bbdb-686f-4171-8bfa-83699a4e480c/31020117660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5950e0-b574-4510-b7e2-5d5b26315b21/80293914892.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/sogem.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/galaxy_note_20_ultra_review_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde31124-16ab-411a-a86c-b7038b5b6f8f/92321554193.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/files_to_sd_card_app_apk.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_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 5244 bytes
SHA-256: 50378c0d44b599928adcd0d70ac692fedaeadff91f79caeb21350749c5426c37
font_01_sfnt_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 10628 bytes
SHA-256: 4653a3406df36ecd5e4f93f0b2335f44d4b25206a0e788be67cab6ee42e5e9b7
font_02_sfnt_off00011967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11967 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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