Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac94ad8b95dfce0…

MALICIOUS

PDF

80.4 KB Created: 2021-03-26 01:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f51a426c5c99d0159c7c401e31d91f3a SHA-1: 7e29a96e92755b3593344ca6f7012e5cbd347a5f SHA-256: bac94ad8b95dfce055355f2c1067ecaccaf7257154e99d95fd489aebddb73368
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with a primary focus on directing users to `https://mezovuduw.ru/award?keyword=autocad+plant+3d+p+id+pdf`. The presence of a link farm on disposable hosting further supports a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL distribution suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8693

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
  • 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
  • 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://mezovuduw.ru/award?keyword=autocad+plant+3d+p+id+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391925/normal_600cef746e2ac.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/icMqS2z/bubble_bobble_nes_switch.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/jepusuxolabotap.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/70pggjh/92568498911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60353007e3f22.pdfIn PDF document text
    • https://cdn.sqhk.co/vutazekerubu/jdjhtRU/73874741229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369323/normal_5fe388479d453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413707/normal_5ff775d89bb52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_6042974b7ec32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449402/normal_60587445b3fb7.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/5hjYjjq/the_chase_2017.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/journaux_algeriens_en_franais.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_6040db17a270e.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/763615078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5fe7918635df2.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/baxegezivumi/mandated_reporter_nys_justice_center.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/how_to_turn_on_a_wow_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/88235332036.pdfIn PDF document text
    • http://wififeju.atwebpages.com/ophthalmology_clinical_vignettes_pemberton.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/candyland_board_game_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/temperature_sensing_devices.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/beer_brewing_process.pdfIn 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_off0000f175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 5028 bytes
SHA-256: f2ca2d41ec112d70d94ab9b8cf0c5b3ca8157d4cd363b1e605c56b125e47560a
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 20732 bytes
SHA-256: b60c2adbf159d291675a14f42a60f967525fc4df6e1f2eaadaff365cfe4a833f

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