PDF malware analysis — malicious · c9ed4d2630d5f8c3

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 07:00:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: cd699332422c1bef994784c79031bce7 SHA-1: bee8ee9e6ef33adae648e9a089efaa7f9f2cd5d6 SHA-256: c9ed4d2630d5f8c33b328f091710293c3629ba1261108002f2883970117293c1

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a known malicious redirector, which is designed to lure users into clicking for game hacks or currency. The document body and heuristics strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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-no-survey-game-hack In PDF document text
- https://www.studio-dentistico-fiume.com/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/coin-master-website_GM406889139.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/minecraft-book-collection_GM479516143.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/tiktok-free-followers-without-verification_GM835599320.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.studio-dentistico-fiume.com/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
- http://studio-dentistico-fiume.com/files/how-to-download-minecraft-for-free_GM479516143.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
`stream_004_off00005048.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5048	25036 bytes
SHA-256: `9361be3c44d25e1f9b656e9a5267b54d7d1e6925d0c992fccff2de90baedb72b`
`font_01_sfnt_off00008a18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A18	18308 bytes
SHA-256: `d3a10f634c5ecc3d7353c949fdf4d39280fe41fff4e373acd575ae0d5bea3c9d`

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