Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f392cb53a36c31…

MALICIOUS

PDF

33.8 KB Created: 2021-07-10 02:35:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8858e19dc90c3dfee593a995db390703 SHA-1: e3364ae185fbecff5e914a52ff37665a4c891da8 SHA-256: 10f392cb53a36c31f265de4ad8efad4cdb33030a286ab49a5a4fe59fa22cb934
142 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and generators, such as 'minecraft-pvp-hacks-game-hack'. It also functions as a link farm, pointing to numerous other PDF files hosted on 'sensorcamera-tw.com', likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the overall structure suggests a lure for users seeking cheats, potentially leading to further compromise.

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/479516143/minecraft-pvp-hacks-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-mad-city-cheat-download_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hacks-mpgh_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-robux-cheats-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/alone-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-free-cards-codes-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-do-you-give-somebody-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-copy-remote-functions-hack-in-roblox_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_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 22072 bytes
SHA-256: 95c56b5758fbfc54e32abf9c41e2fd576c293cd5dd8478ed87e231509bcf8bfd
font_01_sfnt_off000060fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 18472 bytes
SHA-256: 6749c80e28c3912f386bd175e5ee1e1729d67be79a13892bda9db62ae6c784be

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