Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a340334f4934030…

MALICIOUS

PDF

34.6 KB Created: 2021-06-20 00:04:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d6f55e89723151ef90603b1fec014436 SHA-1: 57a16ec78b134a186a4b4361cdfcc07d7c961b91 SHA-256: 5a340334f493403002ca4272d0e25dd4eae8ae6a8da77a7d0d5e8d5ea8829563
142 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into downloading potentially unwanted or malicious content, masquerading as game hacks and generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'PDF_GAME_HACK_REDIRECT_LURE' specifically points to a lure for game-related exploits. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/roblox-free-draw-discord-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/all-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-free-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-jailbreak-exploits_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-girl-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-change-your-name-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-roblox-accounts-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/fastbux-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-clothes-templates_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_off00002fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB1 22416 bytes
SHA-256: 7c49227d8c47979b316f001c8971f386a855e0862893202b1c1e8a4fe3ee60db
font_01_sfnt_off0000617d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 19276 bytes
SHA-256: 1837606bceeef81fc8b407af2b6c1953e56d0391417688802fb049b4b3873350

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