PDF malware analysis — malicious · d4e561c3f977729e

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 11:10:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: bbdf067cf73b237fda496b436b7b972a SHA-1: 0b1f9cc22a89ba19046e3f5516fa7001b650e97c SHA-256: d4e561c3f977729e8b4b8ac5158f1c86e4147ea5fef1192f7c46815d918c0b62

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 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-computer-game-game-hack PDF link annotation
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-do-you-hack-on-roblox-assassin_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/nija-legend-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/shinobi-life-roblox-hack-onyx-2021_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-coins_GM406889139.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-roblox-codes-for-robux-2021_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-robux-co_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-executor-download-free_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-obby-play-for-free_GM431946152.pdfIn PDF document text
- http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/try-minecraft-free_GM479516143.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_off000034cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34CC	22520 bytes
SHA-256: `d599185834cfaa04a7a1c49522481544e9119967f3fdcc6fa001bae7e21b1af0`
`font_01_sfnt_off00006706.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6706	18576 bytes
SHA-256: `c3858ab9c93ee0d54086a54cbca57519016d4b26ff41f14ee4df921336ab6e95`

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