Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b796c04b3a2f0e…

MALICIOUS

PDF

70.7 KB Created: 2021-03-01 12:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cf9a8662103eaed8cff633d787aa7c10 SHA-1: 8bcf9ead76e1bb310ec537d466440d5911ddaf54 SHA-256: d5b796c04b3a2f0e40d22cd83429cbd57ef623df0563a1f4f097170224fe3585
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=faiths+of+corruption+pathfinder+pdf In PDF document text
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/8255452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450624/normal_60151e7b12925.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/altered_carbon_season_1_episode_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_6018e64970ec7.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/99313792804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_6030028a64485.pdfIn PDF document text
    • https://cdn.sqhk.co/womalakifaxa/ijhCVgi/parallel_accounts_of_the_gospels.pdfIn PDF document text
    • https://tuzunogosur.weebly.com/uploads/1/3/0/8/130815213/1287667.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/mimaloribabumezaz.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/singer_4423_heavy_duty_sewing_machine_canadian_tire.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/32180831120.pdfIn PDF document text
    • https://cdn.sqhk.co/saguregifu/hihiBhj/38378452556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378843/normal_5fdd0d20d78aa.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_off0000d87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87B 5168 bytes
SHA-256: d5fab25c8597d2391b79d31cfc2baf3e41de6ac0073d0f2ecadfcc521683b15f
font_01_sfnt_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 10516 bytes
SHA-256: 559fc5dfadaf0b480843c204aeba57b0d33337c5ac3544b855a2b9c95f0cfbf2