PDF malware analysis — malicious · 25c326c1bd2f357a

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 15:26:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 513f2315f67e012f6524f8facd5d913d SHA-1: c314b6fd1fe9bf803baf82b595238d097b8da88f SHA-256: 25c326c1bd2f357a2ca76299a1766f010d3220524f4456e69a3b1168730c7890

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/406889139/coin-master-game-free-download-for-pc-game-hack PDF link annotation
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/pokemon-go-basic-vs-premium-rewards_GM1094591345.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/eli1t3-roblox-free-shirt_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-make-a-cool-roblox-avatar-for-free_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-accounts-for-work-scam-roblox_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/play-games-for-robux_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/roblox-hacked-codes_GM431946152.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
`stream_002_off00002f9d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2F9D	23360 bytes
SHA-256: `29f394c3ebf783f04eecb69445a3a38fced51cc43fe2ea80ef8407faba4f8d67`
`font_01_sfnt_off0000647f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x647F	18992 bytes
SHA-256: `032e54710e7eec53a16972352ef9f572c5ea7590325cb7d8f119c037c145143a`

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