PDF malware analysis — malicious · b4622ab2cec478a7

MALICIOUS

PDF

48.9 KB Created: 2021-06-02 09:02:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 41523aece21cefa3dfedce2108da44a5 SHA-1: 08168c4d7343bf314ea0a5ab97e0946e77b32fcc SHA-256: b4622ab2cec478a7d673d400e0a33c81a71be4b18e7fe6da9fae6b3f27a9cd28

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file 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 0.9796

Heuristics 5

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/roblox-how-to-hack-apocalypse-rising-2021-game-hack PDF link annotation
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/top-5-free-skip-animation-games-roblox_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/give-free-account-roblox-13jun-2021_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-give-someone-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-free-shirts-free-shipping_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-no-verificaton-robux-cards_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-generator-co_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/supreme-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-clothes-for-free-in-roblox_GM431946152.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-generator-no-survey-no-download-2021_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_off00005464.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5464	24916 bytes
SHA-256: `30c330279bf82de15b015323e3f336fba52f96c8b71b69cf89b00b5702828f96`
`font_01_sfnt_off00008e28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E28	2984 bytes
SHA-256: `2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318`
`font_02_sfnt_off00009876.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9876	19512 bytes
SHA-256: `c0bebae6b0a4f2e307fbe9541ce85817211431ea60f65d869f71b5dfb2910b7f`

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