Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8883210d44b396…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 00:18:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d32d682ffd3072982cef62e2d2d10eb8 SHA-1: aac3119c90623b2b893d501ea24be3e2f4a5c909 SHA-256: 7d8883210d44b3961542dba103742a4e78c808b070b203c9f5dbe7d49de886cc
82 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs reinforce the lure of free game-related items, which is a common social engineering tactic to trick users into downloading malware.

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.co/app/431946152/free-keycard-roblox-jailbreak-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id/repository/how-to-earn-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-bubble-gum-simulator-cheat-version_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/mistplay-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-free-hack-pc_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/hack-script-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-pc-free_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
font_00_sfnt_off00003210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3210 21980 bytes
SHA-256: 1eb26932d23d4b39cf85acc99f78e41957af841bb5c86c1482b83c5c2c4658c7
font_01_sfnt_off00006271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 19460 bytes
SHA-256: baceefb391eebac4bf9f4c491b2b1ef683a6ea3c111bf6eb88a2b011c0d3e9cd

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