Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cc0ed69fd699c8…

MALICIOUS

PDF

81.0 KB Created: 2021-02-19 20:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ab5115df4c45f88a9579b12bb59fbe89 SHA-1: 14eb8a05a3086aa4da30333af2070b8868ad11cd SHA-256: 43cc0ed69fd699c8521baaf8eab8e7f1904c2fe9362e6670a92b0ae172227e14
244 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
  • 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 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.
  • 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://yafferge.ru/wb?keyword=dunkin%20donuts%20matcha%20latte%20nutrition%20info In PDF document text
    • https://cdn.sqhk.co/lafuwexale/lgeAoif/smashbox_studio_skin_foundation_color_match.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/ja2Ojis/extreme_car_driving_simulator_hack_mod_download_apk.pdfIn PDF document text
    • https://wozijosetat.weebly.com/uploads/1/3/1/4/131407158/43446714ff80e8.pdfIn PDF document text
    • http://sokuzise.iblogger.org/40270978871.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/gf8mNEv/gomezajotadalovefa.pdfIn PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/tuzigu_makuri_weniroko_fiforurutofu.pdfIn PDF document text
    • https://guxulixekakuved.weebly.com/uploads/1/3/5/2/135294256/pexufilojutaw.pdfIn PDF document text
    • https://cdn.sqhk.co/letabuner/Qjdgfie/95555446382.pdfIn PDF document text
    • http://domensita.fun/81556649926ia2ts.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/dudurat/65613535683.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/idle_poring_stats_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/cibt_russian_visa_application_form.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/blank_piano_sheet_music_free.pdfIn PDF document text
    • http://robexekipojop.rf.gd/hormonas_placentarias.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/95263394579.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_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 5324 bytes
SHA-256: 2c2453f1da3b737344d1c77788248322255f25ddc62eca1a283597209002c95d
font_01_sfnt_off00010fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAB 11576 bytes
SHA-256: 0032d620e70a42ca71c1794d1497849af3c616d269cd72823844e463054293d9