Malicious PDF — malware analysis report

Static analysis result for SHA-256 0845faeaf8e31b39…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 14:48:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2141c45fcdaaeb230f256fe08413b791 SHA-1: 52fffed23b1795dee66c4be73f4ea3a3ce1946b9 SHA-256: 0845faeaf8e31b398f773513d96f375d4b9274fdad2b1236971c67d48b60d847
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a game hack redirector, specifically mentioning 'coin-master-daily-free-spins-link-today-2021-game-hack'. The embedded URL and document body text reinforce this lure. While no scripts were extracted, the PDF structure and heuristics suggest a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/406889139/coin-master-daily-free-spins-link-today-2021-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-instantly-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/feral-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-free-with-pastebin_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-minecraft-java-free_GM479516143.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_off00003164.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3164 22916 bytes
SHA-256: 2a11a8d60ab584f5a6d17e437b41eb0d42602fd962278a36c78c7e9ed19ca488
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 19344 bytes
SHA-256: bda18ad7bc028b2989dfdc10c84b9c87c1dbf0242a88a3a6fbf9217f203e509c

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