Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcec7ac520a7543…

MALICIOUS

PDF

69.0 KB Created: 2021-03-30 00:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aa8ffbad5645b5c83238ac6fa846a262 SHA-1: e56676be4802700db9e7c84e4e458a641b475e6e SHA-256: 8dcec7ac520a75432e4e630823dd1791222f06d3a97507fceadf50fc3aa009f6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion hosted on disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to a phishing site or download further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

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://jumiwimov.ru/123?utm_term=lagu+alika+islamadina+aku+pergi PDF link annotation
    • https://xikixofifot.weebly.com/uploads/1/3/4/5/134597691/filugiwegu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417308/normal_6002a7d4d9bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_602533f01039b.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/ingls_bsico_daniel_welsch_gratis.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/prevention_of_food_adulteration_rules_1955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_605a6b36d7c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fe6292c0cd63.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/which_double_ovens_are_best.pdfIn PDF document text
    • https://dodaxopaz.weebly.com/uploads/1/3/4/8/134865523/8859118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fc71accb0486.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/dragon_age_origins_two_handed_warrior_build_guide.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/97546591423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_604ca84647b86.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/bteb_job_circular_2020.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/how_long_does_redmi_note_4_battery_last.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kizufalugomux.atwebpages.com/kefugewumijinasubijaf.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/how_much_does_a_assistant_manager_at_planet_fitness_make.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/zazuvapogow.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/goflex_home_reset_admin_password.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_off0000d255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD255 5284 bytes
SHA-256: 22f9f1691097cb5c2d441cdab4e1ccb1238cbecfd16dcceb933ef18ecec823d3
font_01_sfnt_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 10412 bytes
SHA-256: 6cbdcf50a349b1eb2c07a8bd934419c0a2289db90c16706b6eec6b5b0498291c

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