Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40f2ab624cccd61…

MALICIOUS

PDF

48.6 KB Created: 2021-06-09 04:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c43d6004933e85ebc5f9e7faec82661 SHA-1: 5e4c1330341e92c41b1fd8f0bb291cedfa4eb21a SHA-256: c40f2ab624cccd6111348cfe01a899d34b3cfd00cc5d280120f67828cb951c18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL is designed to trick users into visiting a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/roblox-one-piece-ultimate-hack-game-hack In PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/cheat-engine-v3-roblox-download_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-card-redeems_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://imagetravelnepal.com/userfiles/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E1 25280 bytes
SHA-256: 4a02a6f7e5c09a52ad1e7def13e1dc6905ca429cbefeded46f8c9d24cdbcd5b9
font_01_sfnt_off00008c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C40 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9952 19004 bytes
SHA-256: a3458cfb28d4b70113e432972c5f4004b392da67b4b642db6226eea8f4d646f7

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