Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54362f161d91732…

MALICIOUS

PDF

65.8 KB Created: 2021-02-14 14:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c36577c7c3c11b808ae50afc0c2fb774 SHA-1: 8d9991b0d4603148e64e3bf3475520ebc61b2f6b SHA-256: b54362f161d91732ae0fb3491ebc43b924b04fb6737df5dae8c3872838b0effc
186 Risk Score

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://baarspo.ru/wix?keyword=tracking+grizzlies+virtual+lab+answers PDF link annotation
    • https://tegotaxuwore.weebly.com/uploads/1/3/2/7/132712324/pofuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5fe10baea95bd.pdfIn PDF document text
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/wizuxabad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_6022be115a41a.pdfIn PDF document text
    • https://nazalufu.weebly.com/uploads/1/3/1/4/131409274/danepofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5ff2d59a3a972.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/8TihNih/spinning_knife_belt.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/jaVjaGy/jungle_masteries_lol.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/heLYMjb/mepiwuwotaxokepo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5ff69dc286843.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/ee720c65ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_6012b75ca66cd.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/4879432.pdfIn PDF document text
    • https://nuzalegexokoz.weebly.com/uploads/1/3/0/8/130814177/xolifoze_gejevanujogezum_murewumix.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/ba5abd.pdfIn PDF document text
    • https://gadakuvinud.weebly.com/uploads/1/3/1/8/131871823/1c61e4.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/gdggOQc/zetaluritijuxelewejajezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D6 5320 bytes
SHA-256: d80ddd5db70cc8de4e85aee2b41f2c6b5cbdf7688d4ff5a7d54eeb2f6cd3c6ce
font_01_sfnt_off0000d721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD721 10268 bytes
SHA-256: 26a4084e6bba4f2e96f66df0403c8f554ef0533ea22df3cbd3e92fa18d0ee0cd

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