Malicious PDF — malware analysis report

Static analysis result for SHA-256 301665b2517f5c5b…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 23:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fddf0fadda26259f4c60cb776965fbf1 SHA-1: bc767e93eae7607134b7c97afccfbd9c63b4332d SHA-256: 301665b2517f5c5b9baec98e77fe4bb7cf4a0b9ac2982004ff2bbfa2c5f98576
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a malicious intent to distribute or redirect. The presence of multiple unknown URLs, including one directly linked to a potential phishing lure ('sale of business agreement template uk'), indicates a probable phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/123?utm_term=sale+of+business+agreement+template+uk
    • http://sodahub.pro/jotirojuliwuwed5spci.pdf
    • http://liketime.online/69544632270jj51g.pdf
    • https://xezorilim.weebly.com/uploads/1/3/4/5/134588859/3737351.pdf
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5febc93c1350a.pdf
    • http://powerpoint4you.ru/40980787548evp58.pdf
    • https://lakofanagobogan.weebly.com/uploads/1/3/5/3/135386994/ruvutorazugotises.pdf
    • https://cdn-cms.f-static.net/uploads/4382201/normal_601173b1ee1c2.pdf
    • http://beautysss.site/ge_spacemaker_microwave_door_handle_replacementl3g50.pdf
    • http://btsworld.org/why_is_my_landline_phone_not_ringing_when_someone_calls_mepk28y.pdf
    • https://cdn-cms.f-static.net/uploads/4393628/normal_602c369944bbf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_580c50406ff64d778e9ad9e949abbb35.pdf?index=true
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_194f11a216aa4829bef270a594d34991.pdf?index=true
    • https://s3.amazonaws.com/fekaduvopigab/jaipur_national_university_bba_assignments_answers.pdf
    • https://s3.amazonaws.com/sorogamat/best_of_akshay_kumar_songs_mp4.pdf
    • https://s3.amazonaws.com/dobesogum/gajudaleratoterage.pdf
    • https://s3.amazonaws.com/wixanarer/annual_report_template_excel.pdf
    • https://s3.amazonaws.com/zaxawetawupo/sec_138_negotiable_instrument_act_bare_act.pdf
    • https://s3.amazonaws.com/xuzakob/differential_equations_questions_and_answers.pdf
    • https://s3.amazonaws.com/jesidofefe/harry_potter_2021_movie.pdf
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_d1c66efa67f943f9af3c9f8348033ae7.pdf?index=true
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_882c5ad4b6354e1ab174f868ffe71d9d.pdf?index=true
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_d7c413367ef44577817de27908c7d032.pdf?index=true
    • 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_off0000f917.bin
abfbd9e1a255cad528262815fd49d32d030eec0f1da350a3d3498fd98e31a01e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 5528 bytes
font_01_sfnt_off00010bd2.bin
6fa6694bdb368c674b9fa0a67b332b3308c8f2daf9fa5abafd7f50f6fd18d13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 10676 bytes

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