Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d794534abeadffd…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 04:29:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 867874a63c9fabb2e90a8bdf52a6393f SHA-1: 4e324ac5a68728e4cd45eb86ff1d5688988e46be SHA-256: 1d794534abeadffd2329158fdc3ef98c01506fdbc999ba01cc476087058c166d
102 Risk Score

Malware Insights

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

The PDF document contains multiple links and references to game hacks and free currency for popular games like Roblox. The primary lure is to trick users into downloading executable files disguised as cheats or generators. The ML classifier strongly indicated maliciousness, and the presence of numerous suspicious URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/aimbot-exe-roblox-game-hack PDF link annotation
    • http://110.232.83.89/slimsppks/repository/free-promo-codes-roblox_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-and-tickets-on-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hack-roblox-vehicle-simulator-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/2021-roblox-hack-no-adfly_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/best-level-7-exploits-free-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-launcher-download-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_off00002d7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D7F 22848 bytes
SHA-256: ccbdb5248d7f41ab2fdd4b1162451119c4948057e19758f9a761a65c21ef69ce
font_01_sfnt_off00006097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 18972 bytes
SHA-256: 843ef4d300b3574587d7d3b0db569cbed6efd3fea6d84b21f9eda658d8fd16fd

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