PDF malware analysis — malicious · a80edaf5a6f5da21

MALICIOUS

PDF

51.7 KB Created: 2021-06-03 11:13:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: e286439d7f17b7aa19f0396595ad22a4 SHA-1: b2c483005d37d0ad5158d1b0aaa13de321d2d75a SHA-256: a80edaf5a6f5da2171b8f55c623c7d34fe4cb444881a2d84bbd96c4d273c1e82

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document displays a fake CAPTCHA and a lure for a 'free generator / game hack', directing users to a known malicious redirector. This indicates a phishing or scam attempt designed to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit user interaction for malicious purposes, likely leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9464

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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 https://netcdn.online/app/431946152/roblox-free-vip-server-game-hack In PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-minecraft-website_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/are-tiktok-free-views-hack_GM835599320.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000052d9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52D9	32488 bytes
SHA-256: `d83472f954ab0a7c75cc9b4f3b2abe2a536c4b33f1744f3613ab18c3765ef46b`
`font_01_sfnt_off00009d7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D7F	2832 bytes
SHA-256: `77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2`
`font_02_sfnt_off0000a72f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA72F	18492 bytes
SHA-256: `1efcb06d77819d5fa3ff728d904b801bcae5178dc1aecdda37cae25940162132`

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