Malicious PDF — malware analysis report

Static analysis result for SHA-256 864e682ea1993d9f…

MALICIOUS

PDF

72.2 KB Created: 2021-04-19 22:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f8a8d07783b0fda496d99bda4585b9b4 SHA-1: 22f075ac41dacd48f55bf8133c5afe22eb7da393 SHA-256: 864e682ea1993d9f8428ca8232cdc4c32c2ed5bd0ef6d6db5471a44dde425e2a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The primary URL, 'https://soxebez.ru/strik?utm_term=who+makes+the+best+chest+freezers', is likely part of a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/strik?utm_term=who+makes+the+best+chest+freezers PDF link annotation
    • https://cdn.sqhk.co/vuvapolaxaj/geGJmig/pibasupagaf.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/jazodijuxam_wukovisejanunog.pdfIn PDF document text
    • http://fullhp.info/persuasive_essay_topics_for_college_studentsowf34.pdfIn PDF document text
    • http://titoto.xyz/59573874240e3of8.pdfIn PDF document text
    • http://uber-global.com/blue_book_car_value_guideopdoy.pdfIn PDF document text
    • http://summ-ita.space/disney_fantasia_2000_questions_answerszyu2g.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/xotikavovinobaguvu.pdfIn PDF document text
    • https://danaguvofuboxi.weebly.com/uploads/1/3/5/4/135401293/3819624.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/398fde606a33acc.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/ihe1Yha/10970697830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_738eee74a3a04b6f996bf5fa52fcf4e8.pdf?index=trueIn PDF document text
    • http://mojigoka.atwebpages.com/concise_algebraic_topology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be6deb5c-2267-40dc-be60-d2330e7cb3bb/what_is_the_most_popular_axe_body_spray_scent.pdfIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_6e12313597bf4801ad5e1840a8411232.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eb2e5e-87fd-4431-b9f0-6e0a2f5cb874/63261935075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08fa2662-408c-474a-9c6f-06986b7b8aca/how_many_marks_to_pass_in_board_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fdd783-f2a2-4b19-8e0a-450e32d6ec64/michael_hampton_anatomy_book.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/entry_level_mechanical_engineering_jobs_colorado_springs.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_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 5356 bytes
SHA-256: 07e9b3c354c40d173b09b10c410237b79d0e2348a237b4e5cf87b6101abfd606
font_01_sfnt_off0000f194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 10040 bytes
SHA-256: fc7347861a882a22f45d863902701cf55dcc85fe55a8f76ed538c009588a47bf

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