PDF malware analysis — malicious · 640fdf80fc766039

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 17:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 0e289c68e88e8cab11987db2b3f5e2cd SHA-1: eb3e596d8f8cdeb8608f3f3333f2d8f73ef41388 SHA-256: 640fdf80fc766039cb9be3f3b57a954d123a132d17f3b992b40181de1cfe9887

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and a download button lure suggests an attempt to trick the user into clicking through to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/hack-roblox-no-virus-game-hack In PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/microsoft-rewards-free-robux_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-cheats-and-roblox-hacks_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/real-robux_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/tiktok-for-free-download_GM835599320.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/rich-free-roblox-accounts_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
`font_00_sfnt_off000052e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52E7	26972 bytes
SHA-256: `9c20bb989da169051d6404d0678c5a954ccad1de8ee9c41ed2fc2b759817d6a9`
`font_01_sfnt_off00008d3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D3D	18576 bytes
SHA-256: `9fe9393a9ee625ae878c29a8b1a02bf5fed6a4652b860132fc0a20e20ad47430`

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