Malicious PDF — malware analysis report

Static analysis result for SHA-256 a197a0f6aec07051…

MALICIOUS

PDF

144.9 KB Created: 2021-02-12 21:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1602ab20324d610330ce92c39dd0c9b2 SHA-1: 2aa6ac1a6a85a5a1999c58a197d25065500403f2 SHA-256: a197a0f6aec070511a3e222e93edae3b6a4edabf8ca75e6b366b23db2d839b7b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to potentially harmful websites. The primary URL, 'https://seumenha.ru/wix?keyword=guide+147+weight', appears to be a lure, and the embedded PDF link farm points to numerous other suspicious URLs, including 'http://sokfresh.fun/botofunetemoguditutvxrz.pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=guide+147+weight
    • http://sokfresh.fun/botofunetemoguditutvxrz.pdf
    • https://cdn-cms.f-static.net/uploads/4365541/normal_6017126c7e46c.pdf
    • https://cdn.sqhk.co/lojosewude/pCtxgdf/gegujopelejiduvuv.pdf
    • https://cdn.sqhk.co/gobajejuz/jaWhfhj/suziku.pdf
    • https://static.s123-cdn-static.com/uploads/4387819/normal_600563d98d34e.pdf
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/sidejil.pdf
    • https://cdn.sqhk.co/kewixoretuze/digdBII/couch_multiplayer_racing_games_ps4.pdf
    • https://cdn.sqhk.co/lepowabog/iicTdif/robux_calc_free_apps.pdf
    • https://cdn.sqhk.co/boxokozofe/XCchhzw/sukisesixedijumutogebex.pdf
    • https://cdn.sqhk.co/tajudozizif/4pibhil/20812749378.pdf
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/2d3a426d2.pdf
    • https://cdn.sqhk.co/vutenugade/viisghz/piggy_helper_mod_apk.pdf
    • http://womans30planet.com/telsta_a28d_manual4be91.pdf
    • https://cdn.sqhk.co/popaxutu/GhDiaij/cute_captions_for_pics_at_the_beach.pdf
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/zeloja-wezemageg.pdf
    • https://cdn.sqhk.co/wexazaruko/15W6x0n/artillery_fire_sound_effect.pdf
    • https://cdn.sqhk.co/jekunesoru/xVThjVN/xorukunakasoxopovonit.pdf
    • https://cdn.sqhk.co/juvexafi/epWrhjj/detentionaire_lee_and_tina.pdf
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5fcf232da0236.pdf
    • http://kupivse.xyz/lupowomevoxoxejizufi2ob5g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0002006a.bin
0f52b56f2e74ba7c85fbe3c701c087e98660b6c2b602aa501b4f801c10311b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2006A 4912 bytes
font_01_sfnt_off0002114b.bin
a7ca7cf63fcd6e45c0d34f00d994e45b009e14591e83b91f7a02b48467011d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2114B 10824 bytes

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