Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b932ca1446bf22…

MALICIOUS

PDF

69.9 KB Created: 2021-02-13 10:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 296f12a54c1006610548001523348c0d SHA-1: 18bfdfbbf29296881df943e53a4c36142af1fa53 SHA-256: a5b932ca1446bf22b9269ee1add3bfdb39733e84437975885102c73f749846b7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=system%20functional%20specification%20template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470221/normal_5fec04b4005e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5fe94d427054e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_60224f02e81aa.pdfIn PDF document text
    • http://visionnew.xyz/borderlands_2_zero_characterngg82.pdfIn PDF document text
    • http://topcreditcheck.info/latest_bb_linker91j.pdfIn PDF document text
    • https://cdn.sqhk.co/zisuzunon/iTjbdhi/banned_apparel_bags_australia.pdfIn PDF document text
    • http://noxesim.iblogger.org/98315129297.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/jbmDgf1/pebirusavanonesiri.pdfIn PDF document text
    • http://teenagetutor.net/44495965705mwjpv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5fce601c2d754.pdfIn PDF document text
    • https://cdn.sqhk.co/xupixawina/6fdjf3J/56945716860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_600b915495f3d.pdfIn PDF document text
    • http://mananeje.66ghz.com/56385887493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejobizife.epizy.com/cheppave_chirugali_movie_audio_naa_songs.pdfIn PDF document text
    • http://nepejalaziba.rf.gd/game_offline_android_terbaik_2018.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_off0000d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 5272 bytes
SHA-256: c65e80a9584976f69313c2bdac9be8a3137edfcf881029de23f26aacdb8b3313
font_01_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 10488 bytes
SHA-256: b68fb7c98c4b7ace18d80e8a8648a8e09c56cec7508f7239bc2d74150d8808ba