Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb310479054ac54f…

MALICIOUS

PDF

65.7 KB Created: 2021-02-19 15:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 05ced44fe0600236f416fb15aae687f5 SHA-1: 578d8c0d92e927e1816f20605c0d53dcf3faa68d SHA-256: fb310479054ac54fafc2e1a3e2988f393a8b6c80d11f00f11ca885b049cde31b
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/aws?utm_term=skyrim+faster+wait+time PDF link annotation
    • http://xarapen.22web.org/juropunejeniferemudeb.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/gihNgfA/dutuwubujinawukele.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hbeicgg/87103875569.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/fedojigudaj/24014990111.pdfIn PDF document text
    • http://bosurigazo.epizy.com/android_linearlayout_set_background_color.pdfIn PDF document text
    • http://vomalowo.epizy.com/keyway_design_guide.pdfIn PDF document text
    • http://gedesopow.rf.gd/baron_trump_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/calendario_2018_meses.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/all_about_me_project.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/16029659368.pdfIn PDF document text
    • http://gilebufamefaf.rf.gd/81629428180.pdfIn PDF document text
    • http://fariwugakek.rf.gd/874467764.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/sugede.pdfIn PDF document text
    • http://kelawezup.rf.gd/hearthstone_legendary_crafting_guide_wild.pdfIn PDF document text
    • http://jexaziled.rf.gd/age_of_sigmar_points.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_off0000c55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 5244 bytes
SHA-256: 88e98e6495067ac1fc5df02b0050a25f693dcaf5a73c7dd64d88f1ca4acaf550
font_01_sfnt_off0000d731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD731 10140 bytes
SHA-256: 4c6f2d11a4baf15c4ce4c86e04b01a0a394f1c09c8ee82c985b20528757b22e5