PDF malware analysis — malicious · 0b74c2a89fdd6aa1

MALICIOUS

PDF

41.6 KB Created: 2021-05-19 09:16:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 4eb9ff2191c0d45e55df730ba3e99865 SHA-1: 12a5ab2447c9c71d16167510c018c45de0e38aaa SHA-256: 0b74c2a89fdd6aa112ee0b189c019f785d727971e405fc65cb4aaffdd8397acc

102 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 callback-phone (TOAD) 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 0.9971

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/how-to-hack-roblox-accounts-on-phone-game-hack PDF link annotation
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/robux-generator_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/open-coin-master_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/roblox-free-robux_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-get-free-robux-in-2021_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_off00004754.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4754	24072 bytes
SHA-256: `24560ca8a3d243bae30e46083e0c0315eb9f277d93ca33e67974b1081de23cd1`
`font_01_sfnt_off00007e20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E20	18908 bytes
SHA-256: `92714a2af62378a1839a0ba08facac9787f9fdc52ffb1ff0f3d5734c2bdfa821`

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