Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dddc831f2fe0d3…

MALICIOUS

PDF

34.2 KB Created: 2021-06-21 22:55:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72d55357ed5415995e4dd0d18125c6b5 SHA-1: ab079c52ebf9a66d5932053a5080f4b5ab13d694 SHA-256: c0dddc831f2fe0d371a9b627eb3ebd55d8e636f4f40f014d702a986e6acb49aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to appear as legitimate content related to free game items. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests maliciousness. The document body, though partially garbled, contains a URL pointing to a potential download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/479516143/will-minecraft-dungeons-be-free-game-hack PDF link annotation
    • http://guimaq.com.br/images/dbor-roblox-free-time-chamber_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-robux-easy-real_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/pubg-uc-redeem-code-midasbuy_GM1330123889.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/easy-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/real-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3142 21976 bytes
SHA-256: 12c6e12d9b91e2e748ab2f0cb5c7f9e07b840b30356d5cdceb2a46574da9f0d6
font_01_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 18796 bytes
SHA-256: a3e2eca43bdc685dc91cfde71aa7da7e93eda67de1cffc55b2ecd2ffb91a605f

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