Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac51c469e40079d…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 09:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9972888ef3c53a9bbde1d3b3626b7420 SHA-1: 1a9cce9bc5c668b391a6a580fecb181a3d9291d2 SHA-256: 4ac51c469e40079da988fe49706086eadc2586da3676531ed5439c9631e17f35
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=spanish+keyboard+layout PDF link annotation
    • http://mowisadewojapu.22web.org/39756535922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_6029dd915baef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_602eae892b95b.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/enders_shadow_audiobook_archive.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/guwemurelabuneposomukeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479673/normal_5ff8dd30015c3.pdfIn PDF document text
    • http://rmk4sale.xyz/isabel_allende_libro_paula4yysd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_600b3231f242f.pdfIn PDF document text
    • http://shoop-fe.ru/memarixemurulujbyy0.pdfIn PDF document text
    • http://4d-5d.com/22034735563ttz7b.pdfIn PDF document text
    • http://summer-italy.fun/99810131364nr2hg.pdfIn PDF document text
    • http://doctora.club/polycab_ht_cable_catalogue19k5y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_6027f0a8352f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fodudedokuka.rf.gd/58789271937.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/chennai_gana_album_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/dekamojew.pdfIn PDF document text
    • http://ritarajekaxitev.rf.gd/instantaneous_velocity_and_acceleration_calculus_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/lopewes.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/82411400892.pdfIn PDF document text
    • http://renepipelusibav.rf.gd/properties_of_pure_substances_thermodynamics_mcq.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_off0000dc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5A 5456 bytes
SHA-256: 30e943be5be4cd5fedacaa7143def1374ae9aaaca24222b12a60c8cff9c331ca
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 11592 bytes
SHA-256: b453dc7b62fb498ad39e8b77bd27b6b4d4ff8b7be66b045cb654fb68bb213bd7