Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f5323c2559d613…

MALICIOUS

PDF

72.1 KB Created: 2021-02-27 19:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e3bbda9713c32e51c8e2b9d4dced4718 SHA-1: a083d1c82217d03e776f27fb1dfffae4fc1f0834 SHA-256: 25f5323c2559d6131347d0a2ad51d11e8b0ff5f8d7461e47bee2b95d2895f30c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=how+often+should+you+lift+weights+over+40 PDF link annotation
    • http://zoomita.fun/butipasekupuwanamexirglyx.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/j0JmZVm/14605491338.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/hajeqhj/celebrity_cruise_ship_stock.pdfIn PDF document text
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/1232302.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/pomulasufatepev.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/fivikaz.pdfIn PDF document text
    • http://smirno.life/how_many_calories_in_a_dunkin_blueberry_muffing7gm0.pdfIn PDF document text
    • http://expressday.online/mavazasurodanuzakokp324p.pdfIn PDF document text
    • https://zomogazafef.weebly.com/uploads/1/3/5/3/135348967/5a1b2.pdfIn PDF document text
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/berelexapokerak_dedezokuradup.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/jDidjf6/renogaweb.pdfIn PDF document text
    • https://cdn.sqhk.co/sadamire/hfz6hiN/lijoneka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tudawufed/jepixipitumijitawajeke.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_off0000dd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 5404 bytes
SHA-256: cf182a08ab1542e096141793e845d6fd1d80d1647a1963be80e2ebd34552eb8c
font_01_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 10288 bytes
SHA-256: 5712e8bb34baa4ed96af717fa0fee15ace61402105ea8e27eff74b8d3dcb5e7f