Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20ce1b03940cf57…

MALICIOUS

PDF

72.9 KB Created: 2021-01-30 07:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1fb3b21f72cd9122c8b69ad36916e1a0 SHA-1: 29dcab1ae8a21f8ff80f5e792583349c6a05b1c1 SHA-256: b20ce1b03940cf57b1dffdab19201581cfd22262ce88f780f931fd81b30bca77
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to exploit users through redirection.

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://druttle.ru/wb?keyword=high%20speed%20pinball%20nes PDF link annotation
    • https://cdn.sqhk.co/pirujezexod/wEMjfhh/wizilomesis.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/cjbhbih/indoor_water_parks_near_me_open_now.pdfIn PDF document text
    • http://mnogolidov.xyz/college_panda_math_sat_bookxuwn1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417220/normal_5fef5f1aa96e6.pdfIn PDF document text
    • http://storeplus.pro/clan_warrior_fallctqh9.pdfIn PDF document text
    • http://4338bacchus.com/chess_openings_pgn_database_downloadrhmg8.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/eehajfH/photo_collage_app_download_uptodown.pdfIn PDF document text
    • http://picsonair.com/absite_review_4th_edition_free_d16nq2.pdfIn PDF document text
    • http://procripton.com/30060092421q4zc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490524/normal_5ffa9635a6bfd.pdfIn PDF document text
    • http://lujuvudav.22web.org/lefilizipavitipedenod.pdfIn PDF document text
    • https://cdn.sqhk.co/tumufiwusifo/hGgh1id/dosobadolawokinitewedudo.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/aiajjgt/virtual_classroom_templates_for_teachers.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/waxegatulo/91494267443.pdfIn PDF document text
    • http://joriboka.epizy.com/49737939555.pdfIn PDF document text
    • http://kipurifer.epizy.com/99196554858.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/79130027592.pdfIn PDF document text
    • http://vakorizu.epizy.com/11586993893.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/jurejosemejalukogarogoze.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_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 5228 bytes
SHA-256: f83e24f81b2ddc274569af0540f3ceeb142ca32d287e8f2dfdbf21e294eba3b5
font_01_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 10176 bytes
SHA-256: 1417478e8659e4d9ee2a8d8b117161fdd7d58f816629b41fb51f92e59a9c8251

Open this report in the interactive analyzer, or submit your own file for analysis.