PDF malware analysis — malicious · 3f7df0c8c4245d29

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 00:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: dfe716114f5a907de46bcd0417bd1ca3 SHA-1: e950de26524f7eef2b03df3a0d93ea8e560402ca SHA-256: 3f7df0c8c4245d29fff00f9d9924e44e2ec8c436c4dc43672669a6c70b26a8e4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The document body and heuristics indicate a lure to download or access content via these links. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirection workflow, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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/hack-roblox-jailbreak-espaol-game-hack In PDF document text
- http://heilzentrum-ulm.de/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/daily-free-spins_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-hack-dark-devs-one-piece_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/como-hackear-los-robux-de-roblox_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/fun-games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/pubg-uc-rate-in-india_GM1330123889.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_off0000502f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x502F	25572 bytes
SHA-256: `c6583a2fb2d252682d1b21c43915df56a240c95dda9abf9afe877fba3167089b`
`font_01_sfnt_off00008b4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B4E	18644 bytes
SHA-256: `c42537bac4a76277598fcaba8a6f8eb98a0f714048f3718af6339f0928c02a9b`

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