Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f8db10d0488f9f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 01:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 760d88ea09fc9f44acf046d82f1f9227 SHA-1: 9c02fcc034e3d714bfeef946fb4b4c43f13939f7 SHA-256: 79f8db10d0488f9fa45bef5b45f2bee6a6e29e482a361bd0559b992853138a7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to a malicious redirector. The document contains multiple embedded URLs that lead to potentially malicious sites, including one identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence.

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/free-robux-giver-2021-game-hack In PDF document text
    • http://fobh.net/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/script-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-lumber-tycoon-2-money-hack-download_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/cheat-teleportation-roblox_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-no-human-verification-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_off00002fc4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC4 23784 bytes
SHA-256: e4f165c6ff5f2180db3a06c24e0e32af23678164f3958c897a97a802c8284159
font_01_sfnt_off00006517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 19352 bytes
SHA-256: 30a3ab957bb90f7da5dada68ae6da8d7584292107aa76cc43cfc2f7a2add9119

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