Malicious PDF — malware analysis report

Static analysis result for SHA-256 3693f6ea54fbc793…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 21:23:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: eaba151aa663e296429fe6a189f4e757 SHA-1: d4f9acc32183126d9ed56de1c51e7452b97d798c SHA-256: 3693f6ea54fbc7937925f9bb36fd3e5bb9c63d8c278c642ad71a50c32c566cb8
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/how-to-get-free-robux-no-human-verification-game-hack PDF link annotation
    • https://www.ma-plast.hr/files/roblox-prison-live-v20-infinite-ammo-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-btool-command-without-hacks_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-any-hat-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-robux-on-roblox-in-2021-pycksel_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/get-everything-free-roblox-console-pastebin_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/ulgamesresources-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/boys-roblox-shirt-free-shipping_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_off00003261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3261 22640 bytes
SHA-256: 64fec044d5cc86687c0b8c08c12a0fa58098a19d9b212ffc587bb1db01d3e096
font_01_sfnt_off0000652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 19496 bytes
SHA-256: 1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1

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