Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74d212a8a81de93…

MALICIOUS

PDF

47.6 KB Created: 2021-05-16 23:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 03f5c819009d62f5ce26c65b55fcdd5d SHA-1: a4c086d019d5b88d6c9c9c05c4597f7a805d34ef SHA-256: f74d212a8a81de930ccfe52b8654843ffb1dc2bb58fc22f1f3221c51f1b9bf7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to websites offering game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/406889139/coin-master-free-spins-2021-no-human-verification-game-hack In PDF document text
    • https://studentcareerinfo.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://studentcareerinfo.com/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.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_003_off00004e3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3C 25240 bytes
SHA-256: ceee9b16d7c841b9aed7c77d2bb77eae88c64ffdc5192ae9f2c9cace823ecc53
font_01_sfnt_off0000889d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889D 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00009625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9625 18820 bytes
SHA-256: 2c71750b10e3f4f91d0cb62777e145d12ef59acd231b22b6c7decf769d1f55c7

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