Malicious PDF — malware analysis report

Static analysis result for SHA-256 f950e13bf239aea1…

MALICIOUS

PDF

36.9 KB Created: 2021-07-03 16:44:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 956592b2bb359937632b7410fadea6ab SHA-1: f9ec209965426af0c780634f6451c41816d7968d SHA-256: f950e13bf239aea1ee384c8b493ae3f08de21965a2644323f0a14a20beef39f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at users interested in popular online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/406889139/coin-master-daily-free-spins-link-today-game-hack In PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/roblox-screensaver-free_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/cheats-for-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/no-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/games-that-really-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-roblox-face-anime-girl-blushing_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/roblox-how-to-get-free-items-in-catalog-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
stream_002_off0000346f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346F 24308 bytes
SHA-256: c40fbc2f2548fd55b83c53b0625685fcd0e10038eb61f5d9ccf9de58ef3fd2f0
font_01_sfnt_off00006baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAA 18940 bytes
SHA-256: 5cc00af5396ac6d0bbe2617822e874747972297797067d6a5c9a01e6a5c32b4c

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