Malicious PDF — malware analysis report

Static analysis result for SHA-256 335276d290524165…

MALICIOUS

PDF

71.3 KB Created: 2020-12-07 15:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a5164524130b7cc25dc8452971b1317d SHA-1: 38ae09af0c4fd5c4f11742e71391b858140ea608 SHA-256: 335276d2905241658190d24bc49bf2bfceebf9e38d1ce0c0d155ac3b5b191c2c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Angular official documentation pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=angular+official+documentation+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f9657b1815d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_5fc68042d7c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5fbf84a86581a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5f98da90eb949.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/mexavofezoxi/general_information_questions_and_answers_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/cestui_que_vie_act.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/juzixugerutunatafis.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/64314808414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee0f1ee-e9a6-48d4-a767-dc1d589461df/coc_cheat_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c726f45-2a8c-4e27-967a-e500901d23ab/vulonalonetukemorixedaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/84039514205.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc654295687f52b6ba616b7/t/5fcbd64836758319a55e0cc7/1607194187569/lugudopuwiwavelajonuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfe0e5147b14804f90a61/1606286862528/brief_applied_calculus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ea4def-07c0-43f3-ae57-4de5c639322c/par_2_file.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FF 5284 bytes
SHA-256: da180ef1d3c0b45f7684eb2943ac19bc9cb19733d02e9eadcfa1701dde6a549a
font_01_sfnt_off0000d6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 10128 bytes
SHA-256: 535c9d20c7ff220761c4c6fde9a000140042780a00852dff9af16b77b8f78375
font_02_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 16628 bytes
SHA-256: 93d61063c2667d3ae1a13246af385fc2141841e042f3666112d660d76cfcd70b

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