Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2ffaa74ec81cee…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 09:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a00d99a9ee7a4a0dc36669c8a112410c SHA-1: fb0bc222b9fa569a85bb4454f9de7224d19e2a97 SHA-256: ac2ffaa74ec81ceef145e2747657b1bc36a7c677dec796b531b927b7c61efff7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are related to game hacks and free in-game currency like Robux. This indicates a likely attempt to lure users to a link farm or SEO manipulation site. The presence of a 'free generator / game hack' lure and a mass external PDF link farm strongly suggests a malicious workflow, potentially for distributing malware or engaging in phishing.

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-shirt-free-edit-avatar-game-hack PDF link annotation
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-load-your-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/moon-tycoon-roblox-this-game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/robux-today_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/btools-hack-roblox-2021-free-download_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/changing-your-walkspeed-in-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-do-u-hack-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_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 22232 bytes
SHA-256: 8ee44c8c49a053256651cd70f535f97152d9a23519d15eb1bc74e167d25f8cbf
font_01_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 19328 bytes
SHA-256: beedcf883723654c3168812fd4e76fa609d7b52b9cb5fdc89751cd0794977e3f

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