PDF malware analysis — malicious · 5b27c6bbef3b261d

MALICIOUS

PDF

49.7 KB Created: 2021-06-01 17:56:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 78360b104731b211ad63575ff7ba44b9 SHA-1: d50f1cc1f7a58ce94bb87a483257f5ae9a272293 SHA-256: 5b27c6bbef3b261dec54bba1f44e829f091364212b25938e20674dda44d4176c

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are presented as game hacks or generators, such as 'imba-tools-hack-roblox-game-hack'. This suggests a lure to trick users into visiting potentially malicious sites or downloading further payloads. The presence of a fake CAPTCHA heuristic further supports the intent to deceive users into performing an action. While no scripts were directly extracted, the PDF structure and link farm indicate a malicious intent to redirect users.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

Heuristics 6

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/imba-tools-hack-roblox-game-hack PDF link annotation
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/hacks-for-the-legendary-sword-rpg-roblox_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/cheat-codes-for-roblox-pet-simulator_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-free-download-full-version-pc_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-2021-july_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-skin-roblox-download_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-password-hacker-2021_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-cheats-online_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-free-hack-download_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/hack-para-counter-blox-roblox_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/easy-robux-today-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-with-no-verification_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_004_off000050f9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50F9	30004 bytes
SHA-256: `8048c173c5bf225b7ae55d6d14646af221aa6da677c7510290162248565cdb15`
`font_01_sfnt_off0000950e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x950E	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00009ef9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EF9	18440 bytes
SHA-256: `04cc427df51668c179293dde8f6e34df875d4f51a5e78f7514765344540ee1df`

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