PDF malware analysis — malicious · b321eb92b649837a

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 19:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 05cfdad8860a35c5e1d2714897150354 SHA-1: ed3f39e0e0ffaaa744730056dfda8583282272e5 SHA-256: b321eb92b649837a838d1616c04641eb264925221dc3fc634e869a929903e19a

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-free-spin-and-coins-links-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-jailbreak-keycard-cheat_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-hacking-gameq_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/gamekit-didnt-give-me-free-800-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-critical-strike-deluxe-hacks_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-anti-speed-hack-fe_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/new-roblox-jailbreak-hack-exploit-walkspeed-noclip-gravity-and-more_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-objet_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-gfames-that-dont-take-password_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-human-vetifycation_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-into-a-full-server-on-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-you-get-free-clothes-on-roblox_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_off00003178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3178	23080 bytes
SHA-256: `d0ef8479fd8407e1219c3f1f4c5f81148a3d77d0408709f480c2f223c5e535b0`
`font_01_sfnt_off0000652f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x652F	18520 bytes
SHA-256: `d69a0a2edd95f9e38b96bcbf992a69ddda142703a71f9cfee81eaec1a075863f`

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