PDF malware analysis — malicious · 5cdede9054c1a65b

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 00:33:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 1eb6df2d3ab6a365591225080956a46b SHA-1: 0e9f2f0ca2b8c4c139851ad2271b977090a32723 SHA-256: 5cdede9054c1a65bb0143b40c574d28a7d9914a2f68fc44504eeda3fc55f65e7

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and a link farm, aiming to trick users into visiting scam websites. The document body and heuristics indicate a lure for 'free robux' or 'game hacks', presenting a fake CAPTCHA to deceive users into clicking malicious links. The ML classifier strongly flags this PDF as malicious, supporting the observed redirection and lure tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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
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/rbxoffers-com-free-robux-game-hack In PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/cheats-for-jailbreak-roblox_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/roblox-how-to-get-free-robux-on-free-robux-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/ways-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-music-id-roblox_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-tiktok-video_GM835599320.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/cheat-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/robux-hack-no-human-verification-needed_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- https://ciptawiratirta.com/assets/CKImages/files/claim-coin-master-free-spins_GM406889139.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_off0000309d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x309D	21792 bytes
SHA-256: `c105c44605dad6d14bcfb1915e3b7021f87dbd5525d2a3cae721df8018b5a124`
`font_01_sfnt_off00006096.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6096	18976 bytes
SHA-256: `a0223b82be68661a8b22d1b4f0340e8af90fd6b3faac36c3bfc3d0e3dd614ada`

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