PDF malware analysis — malicious · e38d5cf7b8635887

MALICIOUS

PDF

35.8 KB Created: 2021-07-08 23:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 640b3e9c2055f4842381199bc6077021 SHA-1: ef685d9311927855932ceb1b08da66ebf2723709 SHA-256: e38d5cf7b8635887bbb5e2582ddcf27a4bcd6747fd75826b8874bac6668294ac

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, identified as a 'PDF link farm', that redirect to websites offering game hacks and cheats. The document body and heuristics indicate a lure to click these links, which likely serve as a gateway to malicious content or phishing attempts. The ML classifier 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.tw/app/406889139/how-to-hack-coin-master-computer-game-hack PDF link annotation
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/hack-for-champion-simulator-roblox-pastebin_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-2021-august_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-reedem-game_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-gear-roblox-script-pastebin_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-free-obc-thumbnail_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coinmasterfreespins_GM406889139.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_off0000342d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x342D	23156 bytes
SHA-256: `03123040f276044f750208e9de953ea5a718eb09a76691ff7603ade4bd3a5731`
`font_01_sfnt_off000067f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67F1	18744 bytes
SHA-256: `abb8091b9ba656fcd895bd1a78debea43f35d283977fb140f6d1e49de3862e6d`

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