Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d468b27b39636f2…

MALICIOUS

PDF

73.5 KB Created: 2021-03-15 10:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ea8a2993351d4873772ce0fbb219a111 SHA-1: 96d642ed2cc1bbb88224dccffe01f1ba8ec6e206 SHA-256: 0d468b27b39636f2720745e0c49a378e937ebbd5aa97640283e6db9793774fcd
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with many pointing to disposable hosting. The document body, though heavily obfuscated, contains keywords related to customer segmentation and SEO, suggesting a lure. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a malicious intent to redirect users to potentially harmful sites.

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://botokaw.ru/award?keyword=customer+segmentation+definition+pdf PDF link annotation
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/4679631.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/can_you_get_grilled_wings_at_buffalo_wild_wings.pdfIn PDF document text
    • http://dezlice.ru/827468713837pabf.pdfIn PDF document text
    • https://naloguvobiwulup.weebly.com/uploads/1/3/1/1/131163976/1614759.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/how_to_ignore_a_guy_on_social_media.pdfIn PDF document text
    • http://mmeueue.space/like_video_status_songyxdbn.pdfIn PDF document text
    • https://zolidejowifaw.weebly.com/uploads/1/3/5/3/135313364/1175045.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/683505.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/xutevuwojiwa-xofekakixusuz-daralasijep-xanapetadubas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e35858-5434-4a4e-9fed-a5ad657ce1b9/mechanical_engineer_jobs_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a8d934d-8b70-427c-ac6b-1b681f009120/vista_128fbp_user_code_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f37b1f3-99a4-41b9-be23-4976af969a06/why_does_a_lizard_lick_you.pdfIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_d0ae89fa5cd44cf68e397a1a29ca4250.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_f5755b7086fd4dc19753a7c6c986b477.pdf?index=trueIn 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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5232 bytes
SHA-256: 43e9b38dedb977e05979b287f3ceeed4b4e2069dd9323f5fdef3ec4c06e4f180
font_01_sfnt_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 11184 bytes
SHA-256: 5d3838368915a445a4e596caa14564385d5c584cf1243ce393604c0aa7a72f16

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