Malicious PDF — malware analysis report

Static analysis result for SHA-256 28793e4aa93ee06c…

MALICIOUS

PDF

61.7 KB Created: 2021-01-21 02:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e0b883742f49159a9621a56684cbb068 SHA-1: 52f51070f8d4e4c8c3d860ec3641a8c7e6d552c2 SHA-256: 28793e4aa93ee06c49b70482e8d37fab56b7f72e5563a004f648d31cc4ba49f1
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://jacksth.ru/wb?keyword=sas%20survival%20guide%20collins%20gem%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5fbafde41f896.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/2IDvbge/92223579246.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/g3ifLpK/ninja_infinity_apk.pdfIn PDF document text
    • https://site-1175201.mozfiles.com/files/1175201/21375421434.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/1gfgfhg/amazon_seller_central_login_uae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484399/normal_5feb1a05eaff6.pdfIn PDF document text
    • https://site-1246156.mozfiles.com/files/1246156/bard_s_tale_apk_data.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/best_meditation_guide_for_beginners.pdfIn PDF document text
    • https://site-1177042.mozfiles.com/files/1177042/50800400381.pdfIn PDF document text
    • http://pimipaxu.22web.org/88669785571.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/5CXKjfk/running_room_race_director_dashboard.pdfIn PDF document text
    • https://site-1173371.mozfiles.com/files/1173371/pinusepuvaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f8d00a6640a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5fd8f51c7177b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugewad.rf.gd/manualidades_de_navidad_con_papel_crepe.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_off0000b507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB507 5636 bytes
SHA-256: 773d9bb3ae3df3b79f28e290d4e77df1705baaaf070d30784605cf83fae873d7
font_01_sfnt_off0000c827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC827 9956 bytes
SHA-256: 541f6820195a7d9995046987148574a795b2098fd56e0e05066b9d728945d9ad