Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bfde54c25b40df…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 21:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 677f92cbe9f23df04d36f3a708a5e6a1 SHA-1: c0a01a3bc4a56e289f0b0352559e83129fb3caaf SHA-256: 73bfde54c25b40df7df2a948176efa32c789f05a8e125a5431e0b7a113066eeb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a lure, employing a 'game hack' theme to entice users. It contains a high number of external links, many pointing to other PDFs hosted on library.forda-mof.org, which collectively form a link farm for various scams. The primary URL, http://netcdn.tw/app/431946152/play-roblox-free-online-game-hack, is a redirector likely leading to malicious content.

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/play-roblox-free-online-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/gain-blocks-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/funny-free-roblox-rthro-avatars_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/wanna-join-my-free-giftcard-giveaway-roblox-id-audio-durv_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/the-crew-cheats-at-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-hacks-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E46 22336 bytes
SHA-256: 6a83c52cc815bb9ff114654e72158eb95ae5887f4cf6472f3daf35bf03cfe1ef
font_01_sfnt_off00005fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 19104 bytes
SHA-256: 5dec955baf3711e79836f4e6ad4fb1b584691504afeaf703317c1f8e1f5dda9f

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