Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c5cdcd5eade95e…

MALICIOUS

PDF

80.4 KB Created: 2021-04-28 17:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5a0697bbe96f307997f524ac05e65ec7 SHA-1: 2576519a9191a9018ae066a4833be364197e0a00 SHA-256: e0c5cdcd5eade95ed456205843db0fbd66581c28306ce300a546216631cb51c3
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable domains and are presented with UTM parameters, suggesting a phishing or link-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection.

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://pelibifir.ru/strik?utm_term=dell+precision+390+audio+driver+xp PDF link annotation
    • http://optarfes.com/uiview_transform_scale_swiftf8qmu.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/bosch_automotive_tools_bosch_obd_1050_mobile_smartphone_vehicle_diagnostics.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/fRhcnkW/33758352503.pdfIn PDF document text
    • https://cdn.sqhk.co/neganobasiwe/fiamX0a/commando_4_game_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_60374f8662099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_60365d0831265.pdfIn PDF document text
    • http://tophomework.space/46603071045u5x1y.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/VyHuvge/mechanism_of_death.pdfIn PDF document text
    • http://vidclips.design/can_t_audible_books_to_itunespqcxp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fd342b4a7934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/64864962335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5325951d-501d-46b2-950d-280e7155cd94/lenabedunebenig.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/pedeweruxuxebusorit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58bee787-3ea3-4614-a585-700f1818973c/how_to_draw_anime_girl_with_headphones_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/piwapor.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_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 5656 bytes
SHA-256: 46c0240aa642953510f878a19661f6a646a847084b43357e3a503ea66b71a7f5
font_01_sfnt_off00010f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F56 10984 bytes
SHA-256: e416b8364135daf88e97e017b3033e32ea7292e80fb5249d2372a32d4c5bbf5a

Open this report in the interactive analyzer, or submit your own file for analysis.