PDF malware analysis — malicious · c2deff26f054cbd4

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 05:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: b6517e16c5bd356d41e4dfdda182dbb4 SHA-1: 4ebea4b753e08a4024fee27b38ff193b63ef0523 SHA-256: c2deff26f054cbd4de4f2e3a253911a919a6cf4df79a277982890f20ff5c4e54

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other PDFs, masquerading as game cheats and generators. The primary lure is for 'Coin Master' and 'Roblox' related cheats, directing users to a malicious URL that likely serves further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/406889139/coin-master-card-collection-link-game-hack In PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-speed-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-bc-hack_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-counter-blox-hack-aimbot_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-youtube-roblox-accounts_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-free-shirts-and-pants-for-girls_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/weird-roblox_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/army-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-free-shirt-creator_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-roblox-wings_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
`stream_002_off000030a7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x30A7	22824 bytes
SHA-256: `f4effc801615d43f83135666c5e51d7f26c7cb7ed0f76213bdecf35bba9197b3`
`font_01_sfnt_off000063d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63D8	18252 bytes
SHA-256: `ffcdde65fbc11ac4564943f1b7ab4cc8ae2466c0ddb41cd48a89f042d41a65fb`

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