Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20ed32598098148…

MALICIOUS

PDF

73.0 KB Created: 2021-02-11 03:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0b2bf455d6f0bc9f026c8dc60a156241 SHA-1: ee89ad5ecf77a1d0007a22e95f16bcfc641f5110 SHA-256: d20ed325980981488570cbf669703798c22bb4a9e60240a424a6717a763e62f0
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://crophysi.ru/wb?keyword=effects%20of%20electric%20current%20class%2010%20pdf In PDF document text
    • https://winilogixibofop.weebly.com/uploads/1/3/1/4/131408061/letofonefamigas.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/4951581.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/5330957.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/6537717.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/u1ibgeO/moto_racer_15th_anniversary_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/ghPmnji/fobekekovilobotose.pdfIn PDF document text
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/divitazanupalubani.pdfIn PDF document text
    • http://4escam-bot.online/floyd_warshall_python_codeeg8vy.pdfIn PDF document text
    • http://dezlice.ru/73038800359emsa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_6006f893d86a5.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/kusifisigazazego.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/4107563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428054/normal_60026c389ffbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5fc977c9d04e4.pdfIn PDF document text
    • http://kozlo.space/nawapunefideq7i9f.pdfIn PDF document text
    • http://ecoservice-vlad.ru/twist_song_wapkingxoazp.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/pFhgjij/jifovugoporigepirugisemep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497081/normal_6006b8e43c7a5.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_off0000e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE034 5300 bytes
SHA-256: 99a12472af19757dde8e8e33fdca9187ce5da4f1acfbd341acaab81acbe2f4ae
font_01_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 10848 bytes
SHA-256: fb99db68e8e31926cefede7ef23a8184d2208cfb11e392dde69be5660dcf4388

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