PDF malware analysis — malicious · 927d0cf3aff4d2db

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 02:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: b64910b4d1786b9de1436c86850b4e87 SHA-1: aa97448d097a7285da657cfd95a5b05c072cd3d1 SHA-256: 927d0cf3aff4d2db881a9f5ee75b81e0feddc8abc0aedbbff26ebea6ebb244af

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 0.9969

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/how-to-get-free-robux-generator-game-hack PDF link annotation
- https://vierabyragazze.com/upload/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/get-robux-today_GM431946152.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
- https://vierabyragazze.com/upload/files/cheats-coin-master-free-spins-and-news_GM406889139.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_003_off0000476f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x476F	27780 bytes
SHA-256: `74aa0bba7239e56da2d78a051d3f44b57256b2365d8fc7cad2a79eb2ae3a8bc5`
`font_01_sfnt_off0000858f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x858F	18512 bytes
SHA-256: `02a745270f20da848e9c9bdefc0721d63769b74524dfc6c51231bae9bb0d5f7b`

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