Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c92d938caa213bb…

MALICIOUS

PDF

68.6 KB Created: 2021-01-31 21:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ad3934e83b3c9510b695ebd1f526a3b3 SHA-1: 92e88e2bc386f3ac4cf9755502156ae6e3da0350 SHA-256: 3c92d938caa213bb35c4d2bc8decce442e81889b3b93e6ae6ac15fbe38b6f523
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://maypoin.ru/aws?utm_term=mod_wsgi+python+3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404123/normal_5fe45ab3b41e2.pdfIn PDF document text
    • http://twoup-viktoria.online/zeresulexuzodagulijo5zfca.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/careless_whisper_tabsbommx.pdfIn PDF document text
    • http://importants.space/gamaxarerugowhebp.pdfIn PDF document text
    • http://twirlini.com/fidolasusiduruvzf0oo.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/fufugs8fm3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418963/normal_5fdb7fb87d49c.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/djhfial/spanish_word_of_the_day_sesame_street.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/ighbB97/gangs_of_london_season_2_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/h4ajchj/lokicraft_2_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/jgjbCey/66395545629.pdfIn PDF document text
    • https://cdn.sqhk.co/nulogoxeja/uhhhdhg/homemade_ice_cream_recipe_evaporated_milk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/hbiiija/gigejulolejowuni.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/zufojadibi/76845275485.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/duruvamigosusirofadem.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_off0000cf94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF94 5276 bytes
SHA-256: e0dd0a6ce2fe49cab76d244e163ae352c985dc4799c5ef7fe7507ea1f530bf6f
font_01_sfnt_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 10628 bytes
SHA-256: bcad9b31b2e0f225f909a542de56aec4a4d9af3cd901e5e0ae470c025ff871e0