Malicious PDF — malware analysis report

Static analysis result for SHA-256 4369d1dfacce424c…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 19:11:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1ffe037d82eb2cfc4ea122bbf94ee192 SHA-1: f974c67adefdfbd6580e93988e3674d45d04fbd8 SHA-256: 4369d1dfacce424ce8e45477266f13205a048f13e2ecc4382c5f80760a68ed02
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a 'free generator / game hack' redirector, suggesting a lure for users interested in game cheats. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate an attempt to redirect users to potentially malicious sites for downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-pics-game-hack PDF link annotation
    • http://mklista.ru/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mklista.ru/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mklista.ru/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mklista.ru/images/free-spin-coin-master-2021-link_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_003_off00004887.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4887 24680 bytes
SHA-256: c57a90f4e1b408c63085dbd7be32ae6ee7d0548594bea3780344a1a8a0dc2483
font_01_sfnt_off0000812c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812C 18060 bytes
SHA-256: 4ad043eb0dd1568e4a2653429ea485ab96dada409891d91a29e15aee7c370b08

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