PDF malware analysis — malicious · b85d9e0dc986ffb2

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 01:27:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 3210234e622c89c66e7da413e67d0c9f SHA-1: aada6b51fab2848eeaf7705685b128fbfd320754 SHA-256: b85d9e0dc986ffb273d78a7ab10e7665b8aa47f2371a1e3fea697c10167ad3c8

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Mark-of-the-Web Bypass

This PDF document contains multiple links to malicious redirectors and impersonates Microsoft to lure users into clicking on a "free Robux hack" generator. The primary link, http://netcdn.tw/app/431946152/free-robux-hack-no-verification-game-hack, is associated with known malicious infrastructure and is designed to lead users to potentially harmful sites. The document's content and embedded links strongly suggest a credential phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/431946152/free-robux-hack-no-verification-game-hack.
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/free-robux-hack-no-verification-game-hack In PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/cheat-roblox-kick_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-get-free-hair-on-roblox-no-hack_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/ipad-roblox-cheats_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/zombie-rush-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-hack-roblox-apocalypse-rising-console_GM431946152.pdfIn PDF document text
- http://www.producthubhob.com/uploaded_files/userfiles/files/hacks-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_off00003010.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3010	22320 bytes
SHA-256: `2e08f7ae2ac92e71289c13aa2adcfc545feded4df62f79c47e0299c258da7edb`
`font_01_sfnt_off000061a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A3	19244 bytes
SHA-256: `96540bd7c84d60e769713d590412c745bf113fce47b0f54684cca50d2dde6ca8`

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