Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ff42bc460dbf84…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 09:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9309252de2d58c77d754a03f0bb1ac34 SHA-1: 53b67615f4f1978a8a12d64da8502c380dfbec96 SHA-256: 83ff42bc460dbf846bd13ee0c51f323e386bc5ff70fdd08bced877123c0fb9da
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 indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/406889139/coin-master-fan-page-free-spins-game-hack. The document body also contains this URL and other similar lures for game hacks, suggesting a social engineering tactic to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure designed to exploit user interest in game cheats.

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.tw/app/406889139/coin-master-fan-page-free-spins-game-hack PDF link annotation
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/controls-for-free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/cch-ly-robux-free-ko-hack_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-free-robux-raffle_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-legit-not-patched_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-hack-into-a-roblox-account-without-password_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-unlimited-money-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hack-to-log-on-any-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/cheat-robux-roblox-2021-free_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-hack-one-piece-millennium_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/master-coins-free_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/if-you-have-builders-club-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-roblox-executor_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_off00003453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3453 23040 bytes
SHA-256: 49a01a206df51916d9f8b26986a2486709c39c90f9b8b4cbb7f9d08baca1b3aa
font_01_sfnt_off000067e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E8 18328 bytes
SHA-256: fc07e399d569c9cb0326c2788f4b655073573cb4c501715abae06525b94755db