Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5a7746609ccc92…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 23:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 71d39cde3f4015a39390ce393c2640a6 SHA-1: 10b7c2fee9fa5c1d097b3761e2044fbd3f10c27e SHA-256: 3a5a7746609ccc92266c36718fdfd77e730a47555a73230d7ecd8dfdc1a5f975
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=how+to+repair+proform+treadmill+incline PDF link annotation
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/xipuvuwadamot.pdfIn PDF document text
    • https://bupuvebawa.weebly.com/uploads/1/3/2/7/132740405/dejuv.pdfIn PDF document text
    • https://ziwodenitisal.weebly.com/uploads/1/3/4/3/134350364/cd8a0e755c0.pdfIn PDF document text
    • https://cdn.sqhk.co/mewedenemez/epia2gi/robert_de_niro_movie_dirty_grandpa.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/zafawuduja_vatusopeg_rasorome_pipobuzawuwibe.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/ibihjbH/kabalamanunadut.pdfIn PDF document text
    • https://nusimilanagazi.weebly.com/uploads/1/3/1/4/131454102/tulutixogun_tebugap_nobazugupiliga_sevopikato.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/5bc0fda8e4.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/fhehi5Y/jituwemaraxevi.pdfIn PDF document text
    • https://kikafizujugu.weebly.com/uploads/1/3/4/0/134012642/8431320.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/AhgPDtu/vexilar_battery_lithium.pdfIn PDF document text
    • http://bluhgang.best/shark_aspirateur_vacuum_manual5fals.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/jokotaziweluge/usmc_silent_drill_platoon_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/answers_to_the_impossible_quiz_number_15.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/shapes_worksheets_free_printable.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_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 5176 bytes
SHA-256: e4bde97b394e0c12ea6c1ea5ae6ab35b7fefdb1384b36d8907dbebee112567b8
font_01_sfnt_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 10184 bytes
SHA-256: 565b7725a00e36a85bbfdba549b90496631c9126265e9ebff627e0de3240bf2f