PDF malware analysis — malicious · b2199ba7d52a995b

MALICIOUS

PDF

47.4 KB Created: 2021-05-19 07:39:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3f6ee65136b57bfe268fd677a3f0c230 SHA-1: eba868f467cd97ce5f72706c0dff963c712e5172 SHA-256: b2199ba7d52a995bd448ec891793f15802885d690be338b627539b585c63e5f3

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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.xyz/app/431946152/free-robux-offers-game-hack PDF link annotation
- https://jdlgroup.ca/images/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
- https://jdlgroup.ca/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/www-roblox-com-robux_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
- https://jdlgroup.ca/images/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/robux-download_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- https://jdlgroup.ca/images/get-free-robux_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/blox-rewards_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
- https://jdlgroup.ca/images/how-to-free-robux_GM431946152.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_003_off00004b3d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B3D	25988 bytes
SHA-256: `74e4c1f236befd550ecb8b395c50cd6c37bc7960c15e9874a27395260dee3e0c`
`font_01_sfnt_off00008791.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8791	6700 bytes
SHA-256: `ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27`
`font_02_sfnt_off000097cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x97CF	18012 bytes
SHA-256: `2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6`

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