PDF malware analysis — malicious · f3ca737b17257f55

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 00:43:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 5fceebd0373a3011fcc9080b734fe9c3 SHA-1: 8034e667e37caab70fa44739b072efdbe93c75fd SHA-256: f3ca737b17257f550cc5fba3cf7568c248952830bc5fd57ed052da69a1b423b6

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, employing game hack and free currency themes to entice users to click on links. The primary link directs to a known malicious redirector infrastructure, which in turn serves a large number of other PDF files. These secondary PDFs likely contain further malicious links or exploit content, aiming to exploit users through deceptive downloads or potentially drive-by downloads.

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/431946152/rbx-roblox-game-hack In PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-hacks-for-apocalypse-rising_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-fe-roblox-script_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-glitches-and-cheats-for-lumber-tycoon_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-badges-free-in-roblox_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/master-coin-hack_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/i-am-gonna-hack-your-roblox-account_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/penguins-on-roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-a-friend-on-roblox_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.roblox.com/my/tasksIn 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_off00003243.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3243	22840 bytes
SHA-256: `a230e4d61637c2ac1f04055b435503530b48b5ad955adae70a3e47f2569795d6`
`font_01_sfnt_off000065af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65AF	18484 bytes
SHA-256: `f26455743a047e8df56ca1524d10cc4c18a922f3a9254ca202c5887b6dcb4309`

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