Malicious PDF — malware analysis report

Static analysis result for SHA-256 f819baf61baa4b12…

MALICIOUS

PDF

46.8 KB Created: 2021-06-11 09:23:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ec760cf353fbefbd61d1f1d010b92ec9 SHA-1: 30c30195fb7efafe84c691c62256819263252efd SHA-256: f819baf61baa4b124cda32e543ed20ba005822cd072923790336e2be29f3d7d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of known malicious redirectors. The document body and embedded links suggest a lure to trick users into visiting potentially harmful sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/counter-blox-roblox-offensive-money-hack-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cool-roblox-free-games_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/tiktok-for-free-textbooks_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pubg-uc-logo-png_GM1330123889.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-account-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://krnl.rocksIn 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_004_off00005472.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5472 26700 bytes
SHA-256: 912dffd01415f54c1ce5dfe7bb496f8671211bb23e638f3aeba2c529da77308e
font_01_sfnt_off00009228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9228 19036 bytes
SHA-256: dd0703d9572c54c46c551a8c12fc8f5b23b8f0fa9f2b75462d006ed55ae098ca

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