Malicious PDF — malware analysis report

Static analysis result for SHA-256 504c79744e1fb998…

MALICIOUS

PDF

45.9 KB Created: 2021-06-07 18:49:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cf9139a3c1d97d13927214fd09d56160 SHA-1: 94651f61231777c49ee136c625eb033e601ea392 SHA-256: 504c79744e1fb998310ec9707a7c3b924f8e55797e9b89cb4e6dd311b14e77d4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a game hack, directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to deliver a payload or redirect to a phishing site. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-retail-tycoon-money-hack-2021-game-hack PDF link annotation
    • http://reggieslockandkey.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-fan-page-free-spins_GM406889139.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_004_off00005320.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5320 25300 bytes
SHA-256: 628c12e6bbf0383a11dbd5f00462ff98b1c57c7913a7fbd97df471294f0689ad
font_01_sfnt_off00008e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E30 19184 bytes
SHA-256: 08a66a6a1b92633393436c4f9427b67ccc9dcd2128194c7b380783d104d9a149

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