Malicious PDF — malware analysis report

Static analysis result for SHA-256 156504e5edc38b7e…

MALICIOUS

PDF

67.5 KB Created: 2021-04-13 02:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 83f431438aff941e41a95ba5dcbea096 SHA-1: eb4a73fc092457dfee5909f0a79130bf6a4fa272 SHA-256: 156504e5edc38b7ed8d3f4d17caecee9fb6c404c422bd8f37dd627d9a8374e4e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'xajibur.ru' suggests the document is designed to redirect users to a potentially harmful website. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

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://xajibur.ru/strik?utm_term=briggs+and+stratton+625exi+air+filter+cover PDF link annotation
    • https://cdn.sqhk.co/pulobegefuzi/cifiic8/letter_o_coloring_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/9qjek1h/nogasavagopavujopuzuzupuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5fe061bcc6ed6.pdfIn PDF document text
    • http://importants.space/chromecast_built-_in_apk_mirrorfkb4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476765/normal_6025f94316c86.pdfIn PDF document text
    • https://cdn.sqhk.co/revogonesox/ifchhx2/can_u_escape_horror_4.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/ghJRVjR/railroad_shunting_puzzle_2_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/e5chdVi/idle_fantasy_merge_clicker_rpg_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_602a108a64dd7.pdfIn PDF document text
    • http://elerctum.org/interview_questions_and_answers_for_medical_laboratory_technologistgg30p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fd64cb4c8730.pdfIn PDF document text
    • http://lotsmen.com/gazikadifuda771mw.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/ODx7Ljj/52295284284.pdfIn PDF document text
    • https://cdn.sqhk.co/wezokobuli/zDjchc8/dragon_castle_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490376/normal_606994dbf3631.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/hdjiicP/99828539135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454304/normal_60071e172ef6f.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/djiNshg/zovogesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E9 5776 bytes
SHA-256: 238b52a7c761bdfdaebad7912cba7d7008f9a33785fb2c3ebb04609a2ee54d7d
font_01_sfnt_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 10424 bytes
SHA-256: 363170fbf5b52faf114f74cffb82931fade386c3bf88d43388c88d358ea8d4df

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