PDF malware analysis — malicious · 3637e39961e3ff6d

MALICIOUS

PDF

33.0 KB Created: 2021-07-24 12:41:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: e30af1dbc2929a6352d7d7c30338b7b6 SHA-1: 3970ba5aab8a246293cd66ab9afc9f47ddafaaed SHA-256: 3637e39961e3ff6dc799dd6add97044beeace55c027274befbac042fee5dbc4a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/431946152/buy-robux-free-game-hack In PDF document text
- https://fv-freinsheim.de/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
- https://fv-freinsheim.de/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
- https://fv-freinsheim.de/images/free-robux-games_GM431946152.pdfIn PDF document text
- https://fv-freinsheim.de/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://fv-freinsheim.de/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
- https://fv-freinsheim.de/images/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
- https://fv-freinsheim.de/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
- https://fv-freinsheim.de/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://fv-freinsheim.de/images/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://fv-freinsheim.de/images/minecraft-free-no-download_GM479516143.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_off00002cea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2CEA	22376 bytes
SHA-256: `0dec3b3bd6151df0e0743a48594a79989992c4625d69f532edbefe4d04af4c60`
`font_01_sfnt_off00005ec8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EC8	18380 bytes
SHA-256: `476ede5eec74bc10ebccc5dfdd7d4cd59b191e9c851b862356eaa276b62fdd8b`

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