Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ae080b0cab1b6b…

MALICIOUS

PDF

71.5 KB Created: 2021-02-23 12:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6216bf7665701c041875cfee4312a0b8 SHA-1: c11153d1bf718479ac806a03e3872ee1a4fadbc1 SHA-256: 85ae080b0cab1b6b1934a1c60777e7d6183da626845771682846fb9fe7c41d0f
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://jacksth.ru/wix?keyword=probability+word+problems+worksheet+answer+key PDF link annotation
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/vujed_lapidizof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_5ff3a05813cf6.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoxoxowex/gKtjgex/what_does_the_bible_symbol_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5fe64f0b2307b.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/fgjjdha/givutipuj.pdfIn PDF document text
    • https://cdn.sqhk.co/nixuvaxuw/hfshhjf/bearded_butchers_net_worth.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/a56106d58b46e3.pdfIn PDF document text
    • https://xubawiki.weebly.com/uploads/1/3/1/1/131163512/54eaa2168.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/993130.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/jgif0hf/best_gun_builds_tarkov_2020.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/1970122.pdfIn PDF document text
    • https://notozovurex.weebly.com/uploads/1/3/2/8/132814393/127b2520.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/Zjdd85n/18184910584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_60175cf6c7ad3.pdfIn PDF document text
    • https://mubuwevuli.weebly.com/uploads/1/3/4/5/134528176/47f0a4084ddb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fee85a8592db.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/pnhehjb/44946598133.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/wixamupelinere/51425808298.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/73549934930.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/dixoxobojubokutizib.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_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 5600 bytes
SHA-256: 79a249da41d110c785e8f296064d1fed44e9953fb0c164efc3179ad13d82a815
font_01_sfnt_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 10776 bytes
SHA-256: de56a36845bc4f7e13f9f80a27a239d09dcfec01fc61d76829ec1b2a5a99c61e

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