Malicious PDF — malware analysis report

Static analysis result for SHA-256 747997dda434e6c7…

MALICIOUS

PDF

66.4 KB Created: 2020-12-23 13:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 63ab005445c668ede7e1fdf7eb3bf00c SHA-1: b40a5ec547e6e8c79fa4122ccd23bc2aefe6b7b9 SHA-256: 747997dda434e6c7b279bfd8cd982c97b976f9a48c73b2374a852189d71ac0b0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 30 external PDFs. The primary malicious URL identified is 'https://trafffe.ru/strik?utm_term=pancake+artistico+onde+comprar', which is likely used to redirect users to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 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.
  • 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://trafffe.ru/strik?utm_term=pancake+artistico+onde+comprar PDF link annotation
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/romafi.pdfIn PDF document text
    • https://rubebipanisoju.weebly.com/uploads/1/3/4/7/134735256/61329e75.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/xunimatirum.pdfIn PDF document text
    • https://rusiwenul.weebly.com/uploads/1/3/5/3/135327855/sozolo.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/pinipavofi-sapetituro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/samopakamefap/beyonce_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/gaston_county_tax_office_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509c2b5c-31a7-4be6-b03f-7535c327b461/mapa_de_bruselas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabd2a8b-5a2f-447f-9a3a-bb7c83f116ac/84946285610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000c2017-de38-4958-8288-87bbe32dc0bf/jevatototefojuwujivelar.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/dawowipujejutakog.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/adverbios_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b13d86b-f1dc-45cc-858c-c0011924955a/neurona_y_sus_partes_maqueta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee31924a-2ca6-4ed5-9f4a-877fcec6b718/prentice_hall_conceptual_physics_chapter_26.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/detodojosupivezivofapox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be5da1f-3776-4589-9d2c-7418d9972c07/6980249775.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/human_physiology_book_cc_chatterjee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB864 5040 bytes
SHA-256: 89668df7bebbe2ab5c0c17e74a16dc463efd2cc14f79203d2681c69f199883a1
font_01_sfnt_off0000c95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95F 11308 bytes
SHA-256: e70657690ddc24b710a15a57e5ca07500cde17f2527e005f2077c2b4ed11239b
font_02_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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