PDF malware analysis — malicious · e3b35bc0cd92259d

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 04:06:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 4b3e775a9875608e394754860ab2b89f SHA-1: 59ad5b5123b44dc87b039a979ad28972eddca8a4 SHA-256: e3b35bc0cd92259db5987000dd5f88ec8ae4a18f35a80d272da1a6f70eff19f1

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a known malicious redirector. The document body and heuristics suggest a lure related to game hacks and free in-game currency, indicating a phishing or malware distribution attempt. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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.online/app/431946152/kuso-icu-roblox-hack-game-hack In PDF document text
- https://www.woundcare-today.com/uploads/files/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/robux-free-co_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-link-app_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-robux-scam_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-games-coin-master_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/apps-that-give-you-free-robux_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_off00005049.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5049	28160 bytes
SHA-256: `8161bd2cf7c585dfd30b3e400c6e0d2cc1747ef1ef86c45cadd74db192cd59f8`
`font_01_sfnt_off00009208.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9208	2844 bytes
SHA-256: `baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a`
`font_02_sfnt_off00009bca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BCA	18320 bytes
SHA-256: `67b96beca271d5ff8db6d4205f4bcb305d403275eb03eb731bd8bb208d3be0d2`

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