PDF malware analysis — malicious · aa12c465622f2cf0

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 15:50:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: d38233b1a7e538741dedcf91415f518d SHA-1: 61972712330a4344e0dbf48dc6b95c040d2881c6 SHA-256: aa12c465622f2cf0645a99a717a3989850801069df6cad4beac2a8bfa39133a7

182 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. It uses an MFA/2FA-themed lure. 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 0.9796

Heuristics 6

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.
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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.online/app/431946152/click-teleport-hack-roblox-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/tradelands-roblox-cheats-see-in-dark_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/rbx-free_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-images_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-many-tiktok-free-followers_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-free-login_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_004_off00005409.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5409	25768 bytes
SHA-256: `9eef715e85ad55eb2fb638829e30534f4313f0a36ea4fa50fbe5d48aa1a3eb47`
`font_01_sfnt_off00008f5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F5C	2844 bytes
SHA-256: `a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1`
`font_02_sfnt_off00009902.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9902	18580 bytes
SHA-256: `c5d5bc2a5bd1f927f4a1d3db82a540ef5dd324bde47b49ccbc6e5dec26a7a606`

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