PDF malware analysis — malicious · c809cbc0eaba96da

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 12:15:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: bfac120b7e891dd4cf92c5b3f31b869f SHA-1: 3af9646cd406ebc2e4c16c5d9905fe9dbd57faee SHA-256: c809cbc0eaba96da7ec11056a692f2ecd587e7245c87169fcaac96326af4b0e8

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/optifine-pe-game-hack. This redirector is likely used to funnel users to malicious sites or download further malware. The presence of numerous links to game-related freebies and hacks suggests a lure to trick users into clicking through to a potentially harmful destination. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or scam attempt.

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/479516143/optifine-pe-game-hack In PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/get-50-00-robux-free_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/master-game_GM406889139.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/roblox-download-free-and-fast_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-tiktok-followers-2021_GM835599320.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-summer-rewards_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-star-wars-clothes-on-roblox-games_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/fast-food-tycoon-free-roblox_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/roblox-dll-hack-april-2021_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_off000035b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x35B5	22292 bytes
SHA-256: `b9bbc7e88a448d4e05b994eecad09ae36cbb34d25537cc5f212fffa95692a1a1`
`font_01_sfnt_off000066d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66D6	18188 bytes
SHA-256: `106e92ccf0483d7e3d6814cb7b7d47902da7918aaf1cd4cd7bc423ce2a0c5fa3`

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