Malicious PDF — malware analysis report

Static analysis result for SHA-256 652975aed1f6ee5f…

MALICIOUS

PDF

48.2 KB Created: 2021-06-07 15:40:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4ca8f7a182ebfdd618b20ad95595fb84 SHA-1: a5a070a8e185367882c904f57b96e684d4ccc2ac SHA-256: 652975aed1f6ee5ffd6af9a103baaae9995e7fa3f40844df117503bd134bcfe7
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free game hacks' to entice users. It contains multiple embedded URLs that redirect to external sites, likely serving as landing pages for scams or further malware distribution. The ML classifier strongly indicated maliciousness, and the PDF heuristics confirm the use of external links for deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-get-free-robux-on-mobile-device-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/buy-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-toy-codes-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/pokemon-go-free-ultra-box_GM1094591345.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005209.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5209 25536 bytes
SHA-256: 3f8e6e40f5cbed0b5759a05202cf854bd5f992421194c6b790b10e33b0a97eb4
font_01_sfnt_off00008d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D30 3044 bytes
SHA-256: 93851eeb806d3025a8b1b6b1bfec2b295747015d1373ac8385966112bbd16bef
font_02_sfnt_off0000979b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979B 18956 bytes
SHA-256: 8c4e438b21c7ae72b394465f2e21dbd4ff4fe0e0141af01b8ec6ce86af140baa

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