PDF malware analysis — malicious · f0f690669a55a2b5

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 15:17:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: fa45b10bf949240696a7b997744a9db9 SHA-1: 45ec73f57d61357238bfc9e015edc59158082ea0 SHA-256: f0f690669a55a2b5aeab4131555d63c1b201073380b8feb8e43394ab6602384b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

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/roblox-games-com-free-game-hack PDF link annotation
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-stuff-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/robux-free-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-fan_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/1m-robux-cheat_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/robux-free-tips-download_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-codes-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/hack-avatar_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-teleplate_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-hack-power-training-simulator-roblox_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-do-i-get-free-robux-tix-and-obc-lifetime_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00002fcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FCB	22624 bytes
SHA-256: `2ffe55aa65b638fa18808e2df786dbe18812bf6cc616a322085d40dccc1e0eae`
`font_01_sfnt_off000061cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61CD	18908 bytes
SHA-256: `63fcf197efd0ab2731d200d540b33a8cc2102b08d529c7d5467440d1b6216513`

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