Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62f4feb2c933870…

MALICIOUS

PDF

35.3 KB Created: 2021-07-01 10:17:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 538a756f3c0b7e1a36ac13dd44846ed8 SHA-1: 8f2550c91e15b8150ca6a45b2cbd826a4989553f SHA-256: d62f4feb2c933870be668f4acfebc1678dac9828709555097aa261ef2d9e8b61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically designed to lure users with promises of free in-game currency or hacks. The document body and heuristic firings confirm the presence of these lures and the malicious nature of the linked content. No scripts were extracted, but the embedded URLs and the document's structure strongly indicate a phishing or scam attempt.

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.co/app/431946152/get-free-800-robux-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/fashion-frenzy-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacked-my-instagram-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/zeus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-hack-your-money-on-roblox-ultimate-driving_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/rbxquest-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacker-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-free-2021-sans-verification-humaine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-btools-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-dop-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-in-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-gear-hack-roblox_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_off0000316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316A 22664 bytes
SHA-256: 94dc9629f4ed45a0a1a06375c7befd39bb8367ef7d0fde2258a434f42c53125e
font_01_sfnt_off00006453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 19200 bytes
SHA-256: 3c688d21a4af671211cbee334d0a68f68211c89cb15e34cb454c2e29129d2dfa

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