PDF malware analysis — malicious · 22622e2c8d89ac63

MALICIOUS

PDF

45.9 KB Created: 2021-06-08 11:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 9dabb20344a530f997ecf157f79857ef SHA-1: 9f0a823cdf27a67c7222ff9e3dad9781787b4b25 SHA-256: 22622e2c8d89ac638fac6f532a9e85362ad596a0d0b5e4f8d191b528f93e8e5f

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary URL, https://netcdn.tw/app/431946152/roblox-hack-2021-working-game-hack, is identified as a game hack lure. The document's structure and embedded URLs strongly suggest it is designed to lead users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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/roblox-hack-2021-working-game-hack In PDF document text
- http://heilzentrum-ulm.de/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-anti-cheat-speed_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-online-play-roblox_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/how-to-use-cheat-engine-on-roblox-prison-life_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/how-to-get-any-hat-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/minecraft-free-app_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/nuevo-hack-de-robux_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/easy-roblox-hacks-not-malware_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/bux-free-robux_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.roblox.comIn 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_004_off00004eff.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EFF	28072 bytes
SHA-256: `7eee9feebbbdc7a5e52307fe8c2f1dd59c972c31b60eeb8e863c810a86918b67`
`font_01_sfnt_off00008e18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E18	19192 bytes
SHA-256: `6fd8388fbfa78b2b38fe230ffeaddb17bae1f644dfd4e8ca03431d1f6a2dcf53`

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