PDF malware analysis — malicious · 865c57491dbf213e

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 23:28:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 5753fda6d2de1d73b399ded438676fe6 SHA-1: 23df7ee259faac2b56763335128b79d2329d6d2c SHA-256: 865c57491dbf213ec91ad06cc917813a59a4e13c8c0f632f77ba6bd8cea16bda

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting free game hacks and generators. The primary lure appears to be a 'free Robux' generator, which is a common social engineering tactic. The embedded URLs are designed to entice users into clicking, likely leading to further malicious content or downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/rbx-gg-free-robux-game-hack In PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-teapot-turret-hack_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/free-500-tiktok-likes_GM835599320.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/free-kitty-roblox_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-no-bot-check-for-real_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/cheez-it-cursor-roblox-download-for-free_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-mad-paintball-hack-2021_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download_GM406889139.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_off000031e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31E3	22776 bytes
SHA-256: `e7ff26b004396614df0a454875ae74bf6f2640e252407d14caea8fa3becd98fe`
`font_01_sfnt_off000064e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64E8	18716 bytes
SHA-256: `5ed4a17f1e1f347672ac707c48d478a4e03b12aa7b666a188f58978ddccfd2a0`

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