PDF malware analysis — malicious · 7e0c4e96a5e98c9a

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 04:23:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 0bd9d27a21450264914d1e4bd323138c SHA-1: 6a785e88fb8eb088a77ba2c4299fd37bc406d00a SHA-256: 7e0c4e96a5e98c9a333285a9a0c91b3e32ca6d72988ec7ca774aabb43697134d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a generator or hack for popular games like Minecraft and Roblox. It contains numerous links to external PDF files and a primary link to a malicious redirector at http://netcdn.tw/app/479516143/free-minecraft-bedrock-server-hosting-game-hack. The document body and heuristics indicate a clear intent to drive traffic to potentially malicious or scam-related content, likely as part of a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/479516143/free-minecraft-bedrock-server-hosting-game-hack In PDF document text
- https://vosco.vn/uploads/vosco.vn/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-cheats-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-roblox-t-sirde_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-copyright-free-music_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-use-cheats-in-roblox_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-roblox-promo-codes-september-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-jailbreaker-hack_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-minecraft-mods-for-ps4_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_off000031aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31AA	22352 bytes
SHA-256: `5619d1479e0d1f26cd06f0287246f6e8b64e4e815fac8daee274705daa2e29cc`
`font_01_sfnt_off00006291.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6291	18672 bytes
SHA-256: `fcf161d812b4feaa3e2bf8e8c417d8656b3909a46e27a4c0a1d90eda073f6fc6`

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