PDF malware analysis — malicious · e5ee98554bc50cb0

MALICIOUS

PDF

49.7 KB Created: 2021-06-07 13:28:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 84d03eb8d1003993fe75f9e24965149e SHA-1: 9aa3db451a9e06779c6315038c75899542506130 SHA-256: e5ee98554bc50cb09020e3ce40cca420b26d23c4ad6fd44453cd9b029102c2f9

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary redirector URL is https://netcdn.tw/app/431946152/free-robux-without-survey-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to malicious websites. The document body itself is heavily obfuscated and contains metadata from the wkhtmltopdf tool.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-robux-without-survey-2021-game-hack In PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-codes_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/tiktok-for-free_GM835599320.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-login-free_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/robux-hack-me_GM431946152.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/pubg-uc-pakistan_GM1330123889.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-robux-not-a-scam_GM431946152.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_off0000502b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x502B	29144 bytes
SHA-256: `be082e61d180d85d40661f4427d8edbdae3d69413d929887e3d0c79ea215c684`
`font_01_sfnt_off0000928e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x928E	2892 bytes
SHA-256: `c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4`
`font_02_sfnt_off00009c78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C78	19300 bytes
SHA-256: `33200476f90899f434e964a462f34e7fee708e9fef0ab9c3ddbb1e39b5e240dd`

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