Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e48d63765c4f703…

MALICIOUS

PDF

73.7 KB Created: 2021-02-14 20:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c783f49908eac5f43fee1218527a92ab SHA-1: 3853344c8e87ef39198b83fc9489c9627207b320 SHA-256: 3e48d63765c4f703cc68d651809b06eca4c174d9974af27613fdad548bd06268
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bologen.ru/123?utm_term=epub+to+pdf+linux PDF link annotation
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/2937486.pdfIn PDF document text
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/54e131.pdfIn PDF document text
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/tedakugemotutuxonufu.pdfIn PDF document text
    • http://gatorama.fun/nanoraniledawehn56j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5ff283995bf98.pdfIn PDF document text
    • https://kazilapematif.weebly.com/uploads/1/3/5/2/135293457/litizemexog_xegevuf_xatamup.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/xanumese.pdfIn PDF document text
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/6df5599.pdfIn PDF document text
    • http://busforpay.online/newsletter_templates_freeq5zf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_60111e67701b6.pdfIn PDF document text
    • http://car-test.pro/wood_crafts_that_sell_2020sdvgf.pdfIn PDF document text
    • http://ductsunlimitedins.com/tutudezuvrwqp.pdfIn PDF document text
    • https://tivositazevuzin.weebly.com/uploads/1/3/5/3/135349871/3643922.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/5666049.pdfIn PDF document text
    • https://gakutuzopekok.weebly.com/uploads/1/3/4/6/134605442/sibulisajudexifaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_601fff82344ac.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/kewakuko/62158779559.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/zubenowonivabawi.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_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 4716 bytes
SHA-256: 1c101cb60b6694a423c857ac07311d716b08588199a7163788d42adf36c15411
font_01_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 11044 bytes
SHA-256: d544889de25921e794ce9cf7ad11b47c67451be6fc00a6c4b24ca6b45f474589

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