Malicious PDF — malware analysis report

Static analysis result for SHA-256 a741d6985253019e…

MALICIOUS

PDF

67.7 KB Created: 2021-02-16 20:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eb233521b1ddaa1e4453dc75ebd1fb81 SHA-1: e03b712e6cee3e2489234635738e1c37cab09462 SHA-256: a741d6985253019e44a6be555312c00c035e8a9c08b328aa6d472b7455165bf8
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://maypoin.ru/123?utm_term=matlab+legend+plot+for+loop PDF link annotation
    • https://cdn.sqhk.co/kekelivig/ptbjjjj/define_go_climb_a_tree.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_600c8c8202971.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/bidovasenedim_luwusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5fdafd7549cd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fd6f9e39691d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_6013f27e209a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370319/normal_60035d62b4fef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5ff7a5a0555f7.pdfIn PDF document text
    • http://hugertely.xyz/antecedentes_judiciales_policia_nacional82p3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471109/normal_5fec3165bc23f.pdfIn PDF document text
    • https://gigadejelurare.weebly.com/uploads/1/3/0/8/130874533/sipetamolap.pdfIn PDF document text
    • http://waystep.site/photo_editor_online_remove_backgroundkpdcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_5fd253fd6f259.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/c8hc0kq/digital_strategy_proposal_example.pdfIn PDF document text
    • http://pristav.pro/kovaak_s_fps_aim_trainer_tile_frenzypt4kp.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_off0000c978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC978 5176 bytes
SHA-256: 86fcc78862f25c8031ae7ca3fea7e6ff6fde7afa4a39f90c8ab9d55c7f32e38a
font_01_sfnt_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 11552 bytes
SHA-256: 0672791acdbd5afc7ad927296523de4166132ae77a7348afc5dec93559b6e0bb