Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9bf3961b9ccae17…

MALICIOUS

PDF

67.4 KB Created: 2021-02-18 16:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0e90f73644ebb6d1f4880ff7e2c59b5a SHA-1: 138bced84ecd2344bbad12d8d39e9b63a0fbce40 SHA-256: c9bf3961b9ccae17488e7afd5916a717a0c15034ccffb449db65fd7306bb03f9
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/aws?utm_term=down+at+the+cross+hymn+chords PDF link annotation
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/980056.pdfIn PDF document text
    • https://mivixotagu.weebly.com/uploads/1/3/1/3/131384173/gesugonowogijuxuf.pdfIn PDF document text
    • http://skidki-day.site/100_luck_and_the_dragon_tamer_skillndk41.pdfIn PDF document text
    • http://fastgetme.online/wake_surfing_mastercraft_prostar_190bowcp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fdeec4085c01.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/7174460.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/64fc48e8a.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/2801912.pdfIn PDF document text
    • https://bojurejid.weebly.com/uploads/1/3/4/8/134887271/c2a5f533f3b3d22.pdfIn PDF document text
    • https://burerekubexu.weebly.com/uploads/1/3/1/3/131381452/wibomoruzo.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/d47fb15b8bf.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/gfghfpZ/97427684633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470677/normal_602d0b20248ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_6020ca31d61bd.pdfIn PDF document text
    • http://hookup754.fun/papyrusutil_-_modders_scripting_utility_functionsfvadb.pdfIn PDF document text
    • http://rerubin.space/counter_strike_online_download_20203brvy.pdfIn PDF document text
    • http://pasetbs.xyz/symetrie_centrale_exercices_corriges92np7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fe649bf22736.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_off0000cc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC25 5340 bytes
SHA-256: 62a07b74e5ad9b2983d33ee8c1b66aeda2522e8500a3f40cd00efbf683e6dfd8
font_01_sfnt_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 10036 bytes
SHA-256: b321c11bdd9d47baf4fd59320e88a58caa1aa5d836c23e13e83b35232eb9fa30

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