PDF malware analysis — malicious · 67bb7ba82e6b63f0

MALICIOUS

PDF

37.1 KB Created: 2021-07-05 09:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 1cbb3b63977cc1c4e7548b90cf8924a7 SHA-1: 9cb6a6e2d20f45f84afb06910f46e8dfc465e9f3 SHA-256: 67bb7ba82e6b63f03f15a3e55bf41fa9cc70d0abdd956d9f951329e8d112ffe9

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one prominently featured as a lure for 'free Robux' and game hacks. This URL, http://netcdn.tw/app/431946152/free-robux-promo-codes-2021-game-hack, is flagged as a malicious redirector. The document body and heuristics indicate a deceptive attempt to trick users into visiting this malicious link, likely leading to further malware download or exploitation.

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/free-robux-promo-codes-2021-game-hack In PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-daily_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-injectors-free_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-survivor-idol-hack_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-accessories-on-roblox_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-t-shirt-free-shipping_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/best-jailbreak-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/getting-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-be-a-parkour-ninja-hack_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-roblox-executor_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/conquerors-roblox-cheats_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
- https://www.markettraderacademy.com/uploaded_files/userfiles/files/code-pour-free-rpg-simulator-roblox_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_off000037a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x37A4	22592 bytes
SHA-256: `c8d223ff84cdb537a16d153e0aca00fcaeb4c6bde79c0bc925eaa5901063bcb8`
`font_01_sfnt_off00006a1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A1C	19708 bytes
SHA-256: `4ffa5120539f8d9e821cc62be6a3cc920cc67344a1ea2f390d2f58e18d351055`

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