Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25b6b22eda48007…

MALICIOUS

PDF

86.7 KB Created: 2021-06-12 10:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7608c3112926624b9882ef91d474d750 SHA-1: 69cd6f75f874db7e71f6ad45e09323a7962cfa97 SHA-256: d25b6b22eda48007d9e78cb62b866f7ddb170cdd6aa5c4503ef662b4807e0b44
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a site related to 'six sigma white belt practice test', suggesting a lure. The PDF structure and embedded content are indicative of a malicious document designed to trick users into visiting a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://medvor.ru/pbw?utm_term=six+sigma+white+belt+practice+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497370/normal_5fd284562bbb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_601e0c4b0a602.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4377109/normal_60aff8a66aa69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60220608d0cbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf906d81-877d-4e57-994b-0ed34bf32101/kotevepaso.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144616293/descargar_musica_de_antonio_aguilar_cumpleaos.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144522042/does_panera_bread_give_free_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5c21e3-f8d8-46e6-825b-2802eb8c4b85/mesojujosuzugigiletuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6698060f-f6e1-4e89-8061-f7082d18efe3/netgear_gs108_v2_manual.pdfIn PDF document text
    • http://tovovojufa.pbworks.com/f/13317827057.pdfIn PDF document text
    • http://vowijeve.pbworks.com/f/kirkland_applewood_smoked_spiral_sliced_ham_cooking_instructions.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/tosipapiden.pdfIn PDF document text
    • http://fuzugimife.pbworks.com/w/file/fetch/145169706/marriage_certificate_format_in_english_gujarat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/767e2d94-ce2e-4efd-901f-b238c0d381a3/john_proctor_my_name_quote.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/namal_novel_by_nimra_ahmed.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/f/30824690284.pdfIn PDF document text
    • http://zolunegoli.pbworks.com/f/60110740538.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/w/file/fetch/144563394/modern_welding_12th_edition_lab_workbook_answers.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/61606198876.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_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 5752 bytes
SHA-256: 98774fda0f0670734e5ec05360582aacffc91caebd404a3e0a3e045cb958b98b
font_01_sfnt_off00012755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12755 11280 bytes
SHA-256: f9280a1713ace0f0c5dc4b933f44f16dbd016fc918b387dcbfbeaef5e71d0bef

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