Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c0808179948f7e…

MALICIOUS

PDF

75.1 KB Created: 2021-03-03 06:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a88f4fe7dfe9500b554cbe10169715f SHA-1: 1ec645295f44399259d9472113a09c64502a2988 SHA-256: b0c0808179948f7ec0f26c6bd91a13547ff7c8e0cd6f6e3a4b6e0ca9ef88398a
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://botokaw.ru/123?utm_term=wash+out+hair+dye+walmart', are likely used to redirect users to malicious content.

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://botokaw.ru/123?utm_term=wash+out+hair+dye+walmart
    • http://gefosezidubajoz.scienceontheweb.net/tebonakesawo.pdf
    • https://cdn.sqhk.co/sowanigog/8icMIij/hit_radio_100._3_casablanca.pdf
    • http://kumisaruvejinud.iblogger.org/p_storm_full_movie_free.pdf
    • https://cdn.sqhk.co/gegatuzikat/YcaI4hd/20864760993.pdf
    • https://simalono.weebly.com/uploads/1/3/1/8/131856945/8750301.pdf
    • https://cdn.sqhk.co/pobopuwubox/miiiegi/kananupesuz.pdf
    • http://rurojewof.22web.org/zakovovumobuxeletif.pdf
    • https://vusimipemukebev.weebly.com/uploads/1/3/0/8/130814393/xalofalu.pdf
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/6590418.pdf
    • http://wozutujetotox.iblogger.org/journey_to_the_west.pdf
    • http://sosunimepewe.22web.org/devemes.pdf
    • http://rolevuses.iblogger.org/xavunigezuxenariloxekujo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://julajibumomas.rf.gd/minecraft_pewdiepie_skin.pdf
    • http://rebobimakefeli.epizy.com/penguin_dance_gif.pdf
    • http://sifepilojiba.rf.gd/hidden_pictures_color.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e83d.bin
bd97a143fa5513d14694ce03c2d45eb40c0a304624ec19a9ee2f2f111cafbae7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83D 5272 bytes
font_01_sfnt_off0000fa1b.bin
53819a4079e7f028b739092673e9eb13716fbb1bca0b34ca33c78a7083fa0f26
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 10572 bytes