PDF malware analysis — malicious · df23073ed41b2cec

MALICIOUS

PDF

34.3 KB Created: 2021-06-23 04:16:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 882df4204354efef4f12aaa49f20c000 SHA-1: c94f8f42cff5e3206ead0098dcd94aaeccee3122 SHA-256: df23073ed41b2cec39ccaca0511d6443155e48fc1abcc2d91c55a4ba0b78514c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game-related cheats or generators. These links redirect to malicious infrastructure, specifically the URL http://netcdn.co/app/406889139/coin-master-free-spins-link-app-download-game-hack, which is flagged as a malicious redirector. The document body and embedded links strongly suggest a phishing or scam attempt to drive traffic to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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
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/406889139/coin-master-free-spins-link-app-download-game-hack In PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/hacking-roblox-project-lazarus-zombies_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/roblox-black-wings-free_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
- https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-generator_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
`stream_002_off0000303c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x303C	22148 bytes
SHA-256: `2ce68bce9d9f17148dc0847a6e23bdb4defb49e7471b5834d80e435ac11d365f`
`font_01_sfnt_off00006177.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6177	18924 bytes
SHA-256: `1b56382f632ae2db992342fc87f733fb374852ec6bae1f300c626c22ef4d9336`

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