PDF malware analysis — malicious · 8dc4082f57deaff7

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 20:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 6f3f41567b26da0d3a47fdb24cc930d3 SHA-1: a5ba6aca3de3c45e6e18c4047dd9f822aac550d4 SHA-256: 8dc4082f57deaff751ac14e2c48fa9e7c8d80a1cd26c0893ad7d4e3476771253

188 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains XFA forms and a malformed stream, indicating an attempt to exploit PDF vulnerabilities. It prominently features a link to a 'free generator / game hack' which is identified as a known malicious redirector. This lure is designed to trick users into navigating to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH

A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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-roblox-promo-codes-game-hack In PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/free-tiktok-fans-no-human-verification-ios_GM835599320.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/roblox-teasurenhunt-simulator-hack_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/roblox-prison-life-20-cheats_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/hoow-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/how-do-you-hack-accouts-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/legit-roblox-hacks_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/roblox-free-clothes-boy_GM431946152.pdfIn PDF document text
- https://www.pasangindovisionjogja.com/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/free-robux-poster_GM431946152.pdfIn PDF document text
- https://pasangindovisionjogja.com/ckfinder/userfiles/files/free-robux-no-verify_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_off00003298.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3298	21976 bytes
SHA-256: `c1ef0ef784bf1591ac3cb92cdc115934d53a2e9f9d737632e212ae731b53dd46`
`font_01_sfnt_off000062bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62BC	19380 bytes
SHA-256: `a452d0c191873ed4d1cd88fa82656ca938fba3e74f496bef56901f9d10460b65`

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