Malicious PDF — malware analysis report

Static analysis result for SHA-256 8836f193c14fcf61…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 10:26:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cc9e226cdba306527c94d9cdb62040bc SHA-1: 00749b4facb7117452883ec58d809fbb3a1d475f SHA-256: 8836f193c14fcf61972aa4c4c51860249c81428df6b3dd3ee1d9b73766e76670
142 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as game hacks and free passes for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users through search engines. The primary URL, http://netcdn.tw/app/431946152/roblox-how-to-get-free-gamepasses-2021-game-hack, likely serves as a gateway to malicious content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/roblox-how-to-get-free-gamepasses-2021-game-hack PDF link annotation
    • https://klp.com.tr/inc/uploads/userfiles/files/best-expolists-roblox-free_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-on-vehile-simualotor-roblox_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-robux-in-roblox-ipad_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-free-play-online-no-download_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-free-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/hack-roblox-brute-force_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/project-lazarus-roblox-hack_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/fond-dcran-gamer-roblox-hack_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-old-accounts-roblox_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-robux-no-human-verification-or-survey-or-download_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_off000032af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AF 22088 bytes
SHA-256: 10ae8889e1b31246ff0a76bb864337ced16110e060e44ace9b454098f615fce0
font_01_sfnt_off00006378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 19756 bytes
SHA-256: 1488742c6e685e78ff058f9baee26ce64e553f35bc885f71fb85e9e3d5dbbaca