Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ebd719b5bd8cda…

MALICIOUS

PDF

77.4 KB Created: 2021-04-02 16:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736a0a16e91accd8269073421227a040 SHA-1: 92f919a030e1c33f5a5e534b351d9466e372910e SHA-256: f7ebd719b5bd8cda263b755a44cc3c508111d1095198d70d0773cec108abf87a
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains metadata suggesting it's related to academic journals, likely a lure. The presence of an external URI points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/award?keyword=agroforestry+systems+journal+pdf
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/653b17adbb4b19.pdf
    • https://cdn.sqhk.co/sufokorume/fgcIlhf/math_soup_calculator_division.pdf
    • https://cdn.sqhk.co/wosipuvetot/AABqheT/wujeropa.pdf
    • https://cdn.sqhk.co/zotofoza/6iafhjz/42994638997.pdf
    • https://nujatorub.weebly.com/uploads/1/3/1/8/131858108/7d47cdf661f237b.pdf
    • https://cdn.sqhk.co/nawovoso/gijiAhi/depreciation_fund_in_balance_sheet.pdf
    • http://derewopenila.22web.org/el_baldio_augusto_roa_bastos.pdf
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/pikorop-xekanesadi-pefugovotenufi.pdf
    • http://taxavifosobedul.iblogger.org/electoral_dysfunction_viewing_guide_answers.pdf
    • https://cdn.sqhk.co/kosadara/jeghFii/60096012262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xijuxosisomuna/dusuzezejedukopipi.pdf
    • https://s3.amazonaws.com/vobuturinivi/dyson_animal_dc25_replacement_parts.pdf
    • http://jerananixakuzeb.epizy.com/mujodosafutapepipovabuz.pdf
    • https://s3.amazonaws.com/firudegix/nirusovebijotifenerujidu.pdf
    • http://sonasekofuxix.rf.gd/baby_boss_movie_in_tamilrockers.pdf
    • http://minirulo.epizy.com/information_overload.pdf
    • http://numowun.rf.gd/formosa_taffeta_co._ltd._annual_report.pdf
    • https://s3.amazonaws.com/sasufufa/piletexuginada.pdf
    • https://5610d23c-e099-485d-ada5-1c5fec8f01b3.filesusr.com/ugd/97e063_190b5a3be5e04eea90de3c8ac046382e.pdf?index=true
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_6388f209b33f404588f8e73658e7bb0e.pdf?index=true
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_2d818b5f7ed54bf3bf2922bcc9238988.pdf?index=true
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_ee0f4f156a1f447eb5fa0faab30604dd.pdf?index=true
    • http://mapureju.epizy.com/fikozusuboxugaz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f173.bin
9a0cd06fa53d100adc8b5e42b6999b68c5adc87880fb0f16893aef362abc2a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF173 5528 bytes
font_01_sfnt_off0001043f.bin
b9fe56d2289f38cc1e3b68e6c97d144d431d4c1a541763e1c73a975b524692fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 10568 bytes

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