PDF malware analysis — malicious · 43f4336e0bfbf188

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 08:26:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: fa8439f9e884119c8efba27f31d96d64 SHA-1: fe2a405b1d722d6a47f0e178233352a8c1b4c3bc SHA-256: 43f4336e0bfbf18869c7d8c6c4b8bfa8c08458ca159a05cd9ae05f29302174da

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 for free game currency and hacks. It contains numerous links to malicious redirectors and SEO link farms, such as http://netcdn.tw/app/431946152/free-robux-websites-no-human-verification-game-hack, which likely lead to further malicious content or malware downloads. The document body and heuristics indicate a clear intent to trick users into visiting these sites.

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/free-robux-websites-no-human-verification-game-hack In PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/robux-free-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-do-the-sex-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-jailbreak-unlimited-money-hack_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-clover-online-cheat_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-2021-or-survey_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/cheat-roblox-offensive_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/put-cheat-codes-roblox-bubblegum_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-by-pressing-g_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-best-roblox-exploits_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-lego-hacking-script_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-studio-free-scripts_GM431946152.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
- http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-candy-id-for-roblox_GM431946152.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off00003512.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3512	21636 bytes
SHA-256: `c289be4ce5e8d9ce51adbb8dd0220a375fd8f3304b2a25e532fbabdf66314ed8`
`font_01_sfnt_off00006466.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6466	19532 bytes
SHA-256: `e3099c9d0ccbc2ba8291647bb1da8d0e7f9f445102052ab388bc51958bf10930`

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