Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2ed1a669633ff7…

MALICIOUS

PDF

61.4 KB Created: 2020-11-30 20:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ad5abebf63e15827bf2742efe3a1defc SHA-1: 12e48d76d7d593af0b3a29864441e01b99ae0017 SHA-256: be2ed1a669633ff7d26d12d00a1acbddd9f404389022151fc420e2296743d46e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 24 links. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=kenmore+ultra+wash+dishwasher+model+665+parts+diagram PDF link annotation
    • https://dumitekajeru.weebly.com/uploads/1/3/0/7/130740207/xajeduxebujebed.pdfIn PDF document text
    • https://rugeponejap.weebly.com/uploads/1/3/4/4/134487210/juwarekux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/valterra_ss01_sewer_solution_kit_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183cb302-23b1-45da-993c-c2952a9c9564/gibad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25168730-4cae-494c-b02e-5afd6693d6e3/13943190115.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/15981361764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca29a00f-2833-4be0-971c-cc4015a491f1/hot_dog_pillowcase_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/lufajadip.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/gattaca_questions_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e54984-bb93-4db5-be61-f9f00f4dcdc7/past_simple_tense_worksheet_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6b64ee-8312-4d6b-8688-4b8b6edde802/skin_tag_on_buttcrack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ce86403f5353fdaeacb4/t/5fc521259ee0f32b87f7aa8e/1606754598035/rafoxuwapezug.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_off0000b13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB13F 5712 bytes
SHA-256: 24205e7c57c08a563449e4193d372606b5c53500aa36590da16cfc5b9ed2c6ec
font_01_sfnt_off0000c49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 10664 bytes
SHA-256: f4ed6cd09b1d1797b8e8f8228ca78eabffc3b7913dd23992b50a7874c7294d25

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