PDF malware analysis — malicious · 7dc306f0c644ba39

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 06:02:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 1b10635c2735665eb11722463bc50f2a SHA-1: 9e973e2e921bd396ad6b44e82b5773bd8bc33134 SHA-256: 7dc306f0c644ba397763e21a05c0c867a3e71b6e3f08fa90ab8b7020cc57d364

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary link, https://netcdn.online/app/431946152/free-robux-obby-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 4

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.
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 https://netcdn.online/app/431946152/free-robux-obby-game-hack In PDF document text
- https://www.liputanbali.com/assets/CKImages/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/free-robux-legit_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.liputanbali.com/assets/CKImages/files/roblox-website-robux_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_off00004f4e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F4E	26788 bytes
SHA-256: `24d8da20deb3c12e7d4fa9e4721180802f5d21e519b561a0aa505029c2c34d16`
`font_01_sfnt_off00008ace.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ACE	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off00009775.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9775	18196 bytes
SHA-256: `adb317c4997580e24d4ed6f1d3168dfe6823b431b7b24dbbc6245ab95f909cf9`

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