Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f3bca77f24190d…

MALICIOUS

PDF

44.3 KB Created: 2020-10-03 12:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f6a8b7051e8165bca4200e5670c07a12 SHA-1: 60c60e947c9335e5ac14c5c10019b7a8eb8d4071 SHA-256: 83f3bca77f24190d5309c3761c151588dc553242bfd86a2fbbdb477de03f1247
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=cedecea+davisae+pdf In PDF document text
    • http://files.tcbmds.org/uploads/1/3/0/7/130775953/9336953.pdfIn PDF document text
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdfIn PDF document text
    • http://files.operativedentistryturin.com/uploads/1/3/0/7/130776476/4761e434e688106.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/jepovi.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/basaso.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/41637951661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1043/files/koldfront_air_conditioner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8856/3361/files/45876830824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/2920/6693/files/69007159917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0282/8712/files/a_wellness_way_of_life_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0130/2168/files/g2_brake_caliper_paint_lime_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5744b265-884c-4024-bb9b-4f0cdc31fcfc/xekowijutugawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b20783-e242-4544-a07e-137a4618d8a3/6073642122.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_off00007135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 4988 bytes
SHA-256: 292c9f58d515e2d9a7efe3601cf085862372a8e40ff13a2ed175498fcb26cb14
font_01_sfnt_off0000824a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824A 10168 bytes
SHA-256: 181d70689e229c9d88faff51e4e7f1e8c65e3d7b6add3b460a13b22f0e8b422b

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