Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f54b93919d0c49c…

MALICIOUS

PDF

66.9 KB Created: 2021-03-03 15:29:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d0f785c5f596a4b9a6ea17928b759c50 SHA-1: c3dc6dffb4067c11ac2a95fb95c024d8f80f658a SHA-256: 3f54b93919d0c49c2b2b9077a1b1be45ab29dd1923ba27e7cfdd6e902d484201
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://kuzutuzo.ru/award?keyword=moto+g6+play+case+canada PDF link annotation
    • https://jinuwipalo.weebly.com/uploads/1/3/5/3/135332432/6815284.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/89929484445.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369933/normal_6006c5a358e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_600afd4993415.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/b30d6feb13f.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/pojikovewijeja/guidelines_focal_liver_lesions.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/types_of_plumbing_fittings_pvc.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/sennheiser_ew_300_iem_g3-a-us_in_ear_monitor_ew_system.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/17127220224.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/variables_in_science_worksheet.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_off0000c7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D5 5404 bytes
SHA-256: 7e1a76abe910e8abc358a00ae4f3ecbab8f4bdd332704f96956b6236d0142d38
font_01_sfnt_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 10248 bytes
SHA-256: ff0b12f2cbdf930e7155294ee22b574b7a53ec4e684af11839eddbb01eebec47