Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ca8309ea40421f…

MALICIOUS

PDF

70.6 KB Created: 2021-02-06 22:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 82ed76b61002cefc403e80bd4d410fd0 SHA-1: 20c3a548fdb5113fde0458ad6adc80726b31e70e SHA-256: 91ca8309ea40421fbd0d778c749b407dd07e62be9ada195c25fe03f48337b533
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/aws?utm_term=datacamp+bokeh+cheat+sheet PDF link annotation
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/259dd799b.pdfIn PDF document text
    • http://winemewimivo.22web.org/construction_supervisor_job_description_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448976/normal_60122129d0e06.pdfIn PDF document text
    • http://suxiwef.22web.org/lajorisofowe.pdfIn PDF document text
    • https://zosumomaxin.weebly.com/uploads/1/3/4/0/134040430/fe0c8eff4876f2.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/uieidgh/oldies_music_radio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5ff6c4139a1b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zukagebogewivur.epizy.com/81100592419.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/self_fulfilling_prophecy_meaning_yahoo_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/guitar_chords_chart_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/puzenuxubupefagesomuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/tunuvu.pdfIn PDF document text
    • http://suvalon.rf.gd/dodofulozematofolo.pdfIn PDF document text
    • http://zititerawori.epizy.com/polycab_ceiling_fan_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/577084076.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_off0000d95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95C 5248 bytes
SHA-256: 637085a8d81cc9321af41b8a19830bf138eb7f6716fab1cf2333318044c5e7a8
font_01_sfnt_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 10220 bytes
SHA-256: 1cf035877d0f067a2f0ce96a637b11b1087cfc83fa012b3cdc18f832ae1e44ab