Malicious PDF — malware analysis report

Static analysis result for SHA-256 792b716c65dd064b…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 15:43:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6557338a85bbe39d7900a342fe010f3a SHA-1: 25a7d5bd8bd07542c12f6c96cdab2eff89fa8eb4 SHA-256: 792b716c65dd064bd8c3dfe306baa154cffc1d875e8838588fbcc58004d08ff2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. It contains a large number of links pointing to redirectors and SEO link farms, designed to lead users to potentially harmful content. The document body and embedded links suggest a scam aimed at users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/free-roblox-t-shitt-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/best-hacker-noob-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-shirts-and-pants-girl_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hack-google-chrome_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-minecraft-java-code_GM479516143.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_off00002db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB4 21676 bytes
SHA-256: c8ca7ba047117b47af9607d0294a3f1e84f707aa2f7f6b13ed42de694a017a2e
font_01_sfnt_off00005d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 19040 bytes
SHA-256: 21602cf2c5a3e4ae12dc75cf53d1a9f6994103cafd7738c820411246a3fbdcca

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