Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb1fe4b7527371b…

MALICIOUS

PDF

33.0 KB Created: 2021-06-26 11:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1ce8064e10e7f9227df5e8bc5b4fa601 SHA-1: 17d280f878b434907add46b64d208387bd96d146 SHA-256: 9eb1fe4b7527371b7f2ae7ddeca74380d7cd32c753d0b1852eb5be9470be1e91
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are disguised as "free generators" or "game hacks" for popular games like Roblox and Minecraft. The primary lure, "Hack Pac Man Roblox", directs users to a URL that likely hosts a malicious payload or phishing page. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the use of game hack lures to trick users into clicking external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/hack-pac-man-roblox-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-cheat-engine-cheat-table-executor_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-hack-someones-roblox-account_GM431946152.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_off00002aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA0 22396 bytes
SHA-256: 93f373673bbfce7d5a7bac2fb08e04a8dfafe641411844a5328be630e661b7ce
font_01_sfnt_off00005c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7A 19008 bytes
SHA-256: 628d14ae7f0cd292c64ce84f9681df0a6d1eb53426ea1b750551eeaf0b48682f

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