PDF malware analysis — malicious · ebb27f55153efd2a

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 09:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 8fd275b7c176e45f40d3aad37b8ac222 SHA-1: 72b77f5de3dcedae2a2129e51eba63d3784eedfc SHA-256: ebb27f55153efd2ab3ef9a7a751d5b7047133016d5dd76cc783c264d07db1741

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators. The presence of a 'download button' lure and the ML classifier's high confidence score further support the malicious nature of this document. No scripts were extracted, but the primary attack vector is the redirection to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/john-doe-roblox-hacker-game-hack In PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/earn-roblox_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.tvoyo.tv/ckfinder/userfiles/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000053fa.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x53FA	26424 bytes
SHA-256: `5f5eddbd3c9385d12442819005fc4c85b70ce73d1b1383b117515b411f3c3ec9`
`font_01_sfnt_off000091f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91F7	3112 bytes
SHA-256: `471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80`
`font_02_sfnt_off00009cb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CB1	18680 bytes
SHA-256: `fd443decf8178cd51ee717e0f89bd27a56480e9e0f5488a79ceaa3e76e017fae`

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