PDF malware analysis — malicious · b9a6d1e39b37d8ef

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 10:05:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 96da8011439a77ae24afeb6db32de244 SHA-1: 9b2c33881613ded17f180e74818bdc4b7d1361b2 SHA-256: b9a6d1e39b37d8efa2454adf150be3d9fc6f34cf50384f25e437aa7c732abd89

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

Heuristics 4

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/406889139/coin-master-heaven-free-spins-link-2021-today-game-hack PDF link annotation
- https://www.knjizara-harfa.rs/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/roblox-follow-flamingo-hack_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/robux-page_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/free-clothes-maker-roblox_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/rewardrobux-com_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/hack-roblox-ccount_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/free-audio-upload-for-roblox_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/roblox-tycoon-hack_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/roblox-da-hood-hack-or-glitch_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
- https://www.knjizara-harfa.rs/files/how-to-download-vermillion-roblox-hacks_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
`font_00_sfnt_off00002e2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E2E	22956 bytes
SHA-256: `756956c2a9012047d25db9299b84bd5fd4c9371d2ef18b35262a23a3268b00e1`
`font_01_sfnt_off00006178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6178	19212 bytes
SHA-256: `9018d35b6adb957a15f04eb7ee50f2e08deef9d1fc1ef5103f9c1835f7b196b3`

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