Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cce19cf2a2524e…

MALICIOUS

PDF

80.0 KB Created: 2021-06-08 23:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1646924c44c8765df56343c91b765d4e SHA-1: 558ada0b135de7a6a57a0e31684d0cfe7c6d9a62 SHA-256: 01cce19cf2a2524e00d27ae3e54390edc1ec75801047dfc473d12bdc0169c6d7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary external URI pointing to 'https://cructi.ru/pbw?utm_term=cushman+truckster+manual+free'. This URL, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://cructi.ru/pbw?utm_term=cushman+truckster+manual+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421218/normal_60111597dd532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5ff7e3c511328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_601e66cbd8d87.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/785346.pdfIn PDF document text
    • https://zojivevu.weebly.com/uploads/1/3/6/0/136090852/soxejusitosixur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_6062340330953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5fd81befc3e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_6055f59bd54c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fcebd2475206.pdfIn PDF document text
    • https://mevexifuk.weebly.com/uploads/1/3/5/3/135345040/53063.pdfIn PDF document text
    • https://fitimunelesim.weebly.com/uploads/1/3/4/9/134900430/4404505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5feb67d3735db.pdfIn PDF document text
    • https://regofixaf.weebly.com/uploads/1/3/5/3/135318676/pedukakuregixudikif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jitijaloj.pbworks.com/f/rubasamosozakavorux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf115c6-5838-4c6d-8ae9-b85a2455a8d2/epson_xp-810_wont_recognize_ink_cartridge.pdfIn PDF document text
    • http://dumogaluz.pbworks.com/f/ielts_cue_card_topics_2020.pdfIn PDF document text
    • http://laxujaju.pbworks.com/f/how_do_i_use_my_nespresso_aeroccino3_milk_frother.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f390c760-f1a4-489b-bbb3-323450831700/marine_corps_workout_of_the_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66393fd9-4208-4f4f-b5cd-3081f43b43b0/physically_based_rendering_from_theory_to_implementation_3rd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071cbe61-ed22-4819-b8ae-19fa35e536c5/how_do_you_tie_a_jump_rope.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/w/file/fetch/144573639/how_to_pair_skullcandy_indy_fuel_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bdd865-985e-45ea-938b-faea6d0da678/bejununesamarip.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 5092 bytes
SHA-256: 21a748a1b7c0774f62d26452241e738baad70642ff6cd9a318a2d290db2f7a59
font_01_sfnt_off00010b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7C 11108 bytes
SHA-256: 2f5cad9f94ef7e2df55ad580f4561f5ba0163f3bd451d75c55e7a1104dae74d0

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