PDF malware analysis — malicious · cb42e82e79ca4c14

MALICIOUS

PDF

49.3 KB Created: 2021-06-16 15:03:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 86d083d1175c2a8b921b8fa72ce0df63 SHA-1: 4060ede598d46602dadb97f59d48b071680086ee SHA-256: cb42e82e79ca4c14369ce5a3b966d0bba1b232a82f635e220e4341b6f26ad7e2

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 0.9228

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.co/app/431946152/free-robux-real-working-game-hack PDF link annotation
- https://www.bridalguide.com/sites/default/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/robux-hack-me_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-now_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-java-free-account_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-item-codes-free_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-full-version-free-download_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-no-verification-no-survey_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_003_off00004df6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DF6	28812 bytes
SHA-256: `9cd56cbd2b8b873835da5512323c7574e9f77466095b590637a2c04c7da2b394`
`font_01_sfnt_off000091ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91EE	2824 bytes
SHA-256: `bd082aa73fbb1a8b3bd2e5c998d3d8e31d1dfc71ea36f846af746f69a0d2ab7f`
`font_02_sfnt_off00009ba2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BA2	19280 bytes
SHA-256: `7e49eb7a59ea21844de5d3ff2e0267f5fd688fc35960f159fa7f4f9ba93c6eaa`

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