Malicious PDF — malware analysis report

Static analysis result for SHA-256 6715b5fbe336c928…

MALICIOUS

PDF

25.7 KB Created: 2021-07-09 07:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 140040aab48879e19448d62a82d1676b SHA-1: 95a907d9ab713003b3504e0dc156d4ab2a3813fe SHA-256: 6715b5fbe336c92864a1c1d7c1355f083628840a756f92db42bfec3d41ea0c18
74 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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-daily-free-spins-2021-game-hack PDF link annotation
    • http://www.6636.com.tw/ad6636/upload/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-hack-website-no-survey_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-robux-hack-deutsch-pc_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/basic-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/hack-roblox-in-game_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-fly-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-roblox-heads_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-project-pokemon-how-to-get-mewtwo-cheats_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F24 23344 bytes
SHA-256: 32ea05714b544f4591460569931d6407c958873a6f3b2de3a3968fcf00e5def5