Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b0ad8214bd605c…

MALICIOUS

PDF

78.0 KB Created: 2021-04-01 09:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 25b96c30980fec952c66a4233bec32f3 SHA-1: 645cb04137d841a5545066cb0dd2b763f4b4eff5 SHA-256: f7b0ad8214bd605c021c803c8507e5562295b2a68a6515a739bc3371dc85f28c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely attempting to direct users to malicious sites under the guise of search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=most+expensive+spider+man+comic+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5fc8c7105fbdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_5fdae25cc6d46.pdfIn PDF document text
    • https://gopopozemilin.weebly.com/uploads/1/3/0/8/130874381/kariw.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/7gfBghx/68593221162.pdfIn PDF document text
    • https://rewagafiwexufot.weebly.com/uploads/1/3/1/8/131856649/2a621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ffc4fe846c5f.pdfIn PDF document text
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/4935367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_6024fc94f3dfe.pdfIn PDF document text
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/sosuzikedu_pedomumomobas_davibozo_mevakivogora.pdfIn PDF document text
    • http://judijemavup.22web.org/wutipazilefekesanogevoto.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/ciagiAt/ice_hockey_skates_for_sale_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/h0jbGig/riroxofabuzaj.pdfIn PDF document text
    • https://mijevofere.weebly.com/uploads/1/3/1/6/131606011/begazadamexejoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vevurikadi.epizy.com/32736763756.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/salicylic_acid_msds.pdfIn PDF document text
    • http://xumusemowujev.epizy.com/botines_con_plataforma_marypaz.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/how_to_add_transmission_fluid_to_a_2010_chrysler_town_and_country.pdfIn PDF document text
    • http://jamadex.epizy.com/bible_crossword_puzzles.pdfIn PDF document text
    • http://gujupikisikali.epizy.com/xogeg.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/cesarean_section.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/sole_e25_elliptical_reviews_reddit.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_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 5524 bytes
SHA-256: 63f8b00747f704e29c17f4148eb517d8aedbb2e7fed44f6b8bf51a4cc8629f2e
font_01_sfnt_off0001059c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 10792 bytes
SHA-256: 41e20cba540b4fb667a57fc107103c9da6802fae539d0094fab86dfa0ce6fe30

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