Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52cbc7bac5ed9c0…

MALICIOUS

PDF

74.0 KB Created: 2021-02-13 06:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bbbf1a0d70d4d296673b18dcdfb0dd99 SHA-1: d53963cf9d0441aff18d83bc38741fbff3c428a3 SHA-256: a52cbc7bac5ed9c0b28b4eb3b60de16d6a7025bf8520d3b9e187e4184d78d758
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=charlie%20chaplin%20movie%20modern%20times%20free PDF link annotation
    • https://cdn.sqhk.co/bokirebi/M4hehfj/44695576859.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/Hjbdrid/zombienoid_brick_breakers.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/ghOjjWm/radio_caprice_synthpop.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/idjiQEJ/night_marchers_movie_2019_trailer.pdfIn PDF document text
    • https://vodesaladamaju.weebly.com/uploads/1/3/5/2/135298616/relivorujepajise.pdfIn PDF document text
    • https://cdn.sqhk.co/wijugilom/0qZ5iif/jetetirulivozi.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/jukeno.pdfIn PDF document text
    • https://cdn.sqhk.co/jomurozop/XgcUobT/kuvifobupawixa.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/c7Uhhih/comprehensive_survival_guides.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/hffWNjh/refutakanonixesokenapolaz.pdfIn PDF document text
    • https://rogosibaf.weebly.com/uploads/1/3/4/5/134590501/getibepovamom_jejudazuneguba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzurofomurab.rf.gd/25202591375.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/batotarakupen.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/97512886179.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/video_er_facebook_private.pdfIn PDF document text
    • http://jefebewo.epizy.com/lelirufarijajeje.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/abstract_format_chicago_style.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/infrastructure_australia_business_case_template.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_off0000e3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D1 5360 bytes
SHA-256: 348130a01e01dc5632fcc34b0f7d2fae7000113a0cc2e680c953950e4b78ce30
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 10928 bytes
SHA-256: 3fa41a6a513bda51c445fc2b24090b416154d8ddd89d9930b1b3274e63836435

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