Malicious PDF — malware analysis report

Static analysis result for SHA-256 56384c384ee7c683…

MALICIOUS

PDF

67.9 KB Created: 2021-03-04 10:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b8a857975f70756b651516010c943642 SHA-1: 48994cd65d126bbbe50ba1b30366c3eddb555b3d SHA-256: 56384c384ee7c6839cb2bcb8d762ea4bc20b8771b0871c8a6772d9a1493956ae
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://zajinet.ru/award?keyword=single+and+multivariable+calculus+early+transcendentals+solutions PDF link annotation
    • https://lusovajilabijix.weebly.com/uploads/1/3/5/3/135351537/de8b1.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/doxigusiwuz.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/94303371406.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/24606915907.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/8747224.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/dixurobipodikovimizemotiv.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/a_long_obedience_in_the_same_direction_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/hb5c4jO/splashlearn_logo_transparent.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/55547275519.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/tesapibebujep/54467600436.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/tc_helicon_voicelive_2_firmware_update.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/zevuti.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_off0000c917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC917 5664 bytes
SHA-256: a33860dafdfdde15c7c01f30e9775488a6e801fe4d4c3b1b507c41c3167f4040
font_01_sfnt_off0000dc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC52 10536 bytes
SHA-256: 22ac2b7b1a79ba9c9eb2ba3bfdea0b14924aba125dbc36f3ca3efd4ddb28a1e0