PDF malware analysis — malicious · ac2f3749d6921bda

MALICIOUS

PDF

45.5 KB Created: 2021-06-13 19:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 2cf2a19ecc1e07b8f4267427dbbee75a SHA-1: 5423376139aae3d3f7dc17991a461392f08979a7 SHA-256: ac2f3749d6921bdabbb39f8c53ff12a1c5eca5c447a18d99448e3ead1cd12f92

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically advertising 'free generators' and 'game hacks'. The document body and heuristics indicate a lure to click these links, likely leading to further malicious content or phishing pages. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a scam or phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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.co/app/431946152/free-robux-clan-game-hack In PDF document text
- http://www.manchieu.vn/upload/editor/files/robloxhacks_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/roblox-hack-client_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/generator-for-free-password-roblox_GM431946152.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/coin-master-strategy_GM406889139.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- http://www.manchieu.vn/upload/editor/files/how-to-sue-roblox_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_003_off00004a48.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A48	25404 bytes
SHA-256: `b11e1266abf5af96c604a38ce742a9da831f05fa3c61da46bfcb101750057456`
`font_01_sfnt_off0000851e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x851E	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008f09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F09	18316 bytes
SHA-256: `820f9c3a282c62ae08a7ff28282ffc72ca7be22ce7eb1b6c820ee9012adaf1bb`

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