PDF malware analysis — malicious · 7a34ffd2f813cd4c

MALICIOUS

PDF

36.6 KB Created: 2021-07-04 10:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 22c02f4bd0a01fc5ca85845f976dd534 SHA-1: ad268cd175bcd0990a04fd0de1a9a28ef3781601 SHA-256: 7a34ffd2f813cd4c3b272c86bb13bc5e0c72aca7b6f0885c624c0db0ed7b08e8

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-coins-coin-master-2021-game-hack. This suggests the document is designed to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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.tw/app/406889139/free-coins-coin-master-2021-game-hack In PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-robux-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/yin-and-yang-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-robux-only-username_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/roblox-studio-free_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-robux-avatar-with-private-group_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-roblox-clothes_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/coin-master-free-online_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-robux-2021-no-survey-no-download-no-pasting_GM431946152.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.indobalitour.com/new/public/ckfinder/userfiles/files/roblox-hack-client-windows-10-2021_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_off0000373b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x373B	23328 bytes
SHA-256: `b817b30b6057c17b74bc1055c65b497a4e612762c0afa62afb44920c133f0307`
`font_01_sfnt_off00006bf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BF7	18400 bytes
SHA-256: `2a3e6040a3b782e95a9624477cdba266f2d22bc61ba2df799c05fa910d77e25c`

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