PDF malware analysis — malicious · 6db611cc4fd8069a

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 08:10:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: a9780468febac4bf9443320ed4ec5737 SHA-1: 8104ca3262905f3620fc6499c03990ef2e5a8f90 SHA-256: 6db611cc4fd8069a28a6d2397a2cff0ade67e0afcf2177eefabcd3e616c49c2d

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/kuso-icu-roblox-hack-game-hack PDF link annotation
- https://www.alamrayabali.com/assets/CKImages/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-robux-no-password-or-verification_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-new-code-for-free-sword_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/how-to-get-free-robux-easy-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/hacks-for-sailing-roblox_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/can-you-get-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-gang-rape_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-moderators_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/how-to-get-free-robux-easy-on-computer_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/como-tener-dinero-infinito-en-jailbreak-roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-robux-no-downloads-2021-real_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/how-to-get-free-robux-nicsterv-2021_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/flame-gg-free-robux_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_off00003094.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3094	22780 bytes
SHA-256: `9e83d22a62d8dfccad10660eb932df70814136ccf35632bfab5c8ac0cdaa1098`
`font_01_sfnt_off0000636b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x636B	18796 bytes
SHA-256: `ed83452c86803b1917e9a3b610437d6af8da1f9c573d2e0b135e2eca29acc62c`

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