Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f25074cad0af3e7…

MALICIOUS

PDF

84.4 KB Created: 2021-04-19 01:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1576c37ace77d4e5013f371357d28dc5 SHA-1: 8d577abc117256b6f7b0402b63fdfccae6216bd2 SHA-256: 9f25074cad0af3e7de7f981243b30bab4ab0ea963f3de490d3329e1a26c43226
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=lowrance+elite+5+hdi+trolling+motor+transducer PDF link annotation
    • https://cdn.sqhk.co/xupodafib/vIjgdib/bifakogezo.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/19316260270.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/jBgdgc3/78708529018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_60325dc33f62e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5ffa29a292d6f.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/what_are_the_basic_computer_course.pdfIn PDF document text
    • https://cdn.sqhk.co/tikomekove/LPK7ihJ/ldn_muscle_bikini_guide_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/rFhehgh/alien_invasion_adventure_3d_pics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_603728e61032c.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/axis_bank_net_banking_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/iaQUljb/wallpapers_for_iphone_11_4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_601f6c6ee4f02.pdfIn PDF document text
    • http://insta-sale.site/fabixujajop9lod.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/which_elgato_is_best_for_streaming.pdfIn PDF document text
    • http://characduwe.space/the_power_of_one_book_quotest2cym.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/969c3457-3d62-484e-b0e9-93775ff47282/think_like_a_freak_chapter_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cce316c-c302-48b8-8ad0-056e04d6618c/2021_release_date_games.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/arithmetic_mean_formula_for_grouped_data.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_15f9cffc13a74a1f9532482c71853dbc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/328cb34c-47da-4fed-84a0-6ab7e06b1819/que_es_una_ficha_bibliografica_y_un_ejemplo.pdfIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_d42cd278b53f42bc8504c36df06eaef4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fecd447-1ff6-4b7c-b244-4924d7b1c10e/what_deep_meaning_does_fire_and_ice_carry_in_it.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 5392 bytes
SHA-256: 4f4daf2a7f0d30cc7da2591bcd6c0e66508c746c478afa81d9589bfe6339581a
font_01_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 11768 bytes
SHA-256: 872a54118a9abe0d7a5891198e1c59952e563cfb8dcde3a1913c3212630799de
font_02_sfnt_off000135a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176