PDF malware analysis — malicious · 8dd13b3fe4e934fd

MALICIOUS

PDF

45.6 KB Created: 2021-06-01 03:39:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 63eb2b588d93ab85521ccd080c29b5f7 SHA-1: 6c73aa6fc17336f608c5f7007e31901c80c45d8b SHA-256: 8dd13b3fe4e934fde87561c5e9af027d72f515ecbfa3b2a4c1681898421d14ac

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 0.9864

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/kill-all-zombies-in-zombie-rush-script-hack-roblox-game-hack PDF link annotation
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-redeemable-roblox-cards-2021_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/cheat-engine-dragon-ball-z-final-stand-roblox_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-hacking-skill-roblox-entry-point_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/telecharger-hack-pour-roblox-mad-city_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-roblox-money_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-website_GM431946152.pdfIn PDF document text
- https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification_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_004_off000051ac.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51AC	25396 bytes
SHA-256: `2be39d4d5abd04b3eefb36da980d733f9a189d946bfc5cd66752b07262cfc988`
`font_01_sfnt_off00008cc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CC1	19240 bytes
SHA-256: `6ef456c72d0f0216558ab99fe5201cf3d30dd72e5367f192ad5faa23b6437692`

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