PDF malware analysis — malicious · f93c9d06bffac4fd

MALICIOUS

PDF

50.2 KB Created: 2021-05-20 00:31:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: d794f4fc32bf480277b7ba37a99b740d SHA-1: 6d2542b6b52f370a1f5cdb83dc533be7a0962d03 SHA-256: f93c9d06bffac4fd43235f5fc95e1d2e7f4ca571d2299e034d556906dd8057d1

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDF files, masquerading as 'free Robux generators' or 'game hacks'. The document body and heuristics indicate a lure to download potentially malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a high likelihood of a downloader or exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9349

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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.xyz/app/431946152/apps-for-free-robux-game-hack In PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/oginject-co_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/roblox-font-free_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/websites-for-robux_GM431946152.pdfIn PDF document text
- https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/hack-coin-master-no-survey_GM406889139.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_003_off00004d40.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D40	24952 bytes
SHA-256: `d3dfe06a6d977d2ad0f3fca085b8143e93c7519c8f25699fef680e66dc378773`
`font_01_sfnt_off00008753.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8753	8252 bytes
SHA-256: `7ebedd6b182173c8e55836cb0d114b2c4a0ac85c96a51b9f0706c935f8415fea`
`font_02_sfnt_off0000a267.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA267	18192 bytes
SHA-256: `b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b`

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