PDF malware analysis — malicious · 56a7db8c451b4ba8

MALICIOUS

PDF

32.5 KB Created: 2021-07-22 14:52:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 444ff41e730e5d2b2f36e2256252c16d SHA-1: b5e19577879eba749a8735fd35f85246ceee2400 SHA-256: 56a7db8c451b4ba863a82ee61663c0d9f16964bb7844ba9a54bab72c155fe305

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators' for in-game currency like Robux. The embedded URLs and the document body text strongly suggest a social engineering lure designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF's structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/how-to-hack-to-get-robux-game-hack In PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-free-version_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/is-minecraft-free-on-pc_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
`font_00_sfnt_off00002a57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2A57	22184 bytes
SHA-256: `299ac3c592923a88340db82dcd4a1f4ad7b2088586f8f54569627c9b6331c8ad`
`font_01_sfnt_off00005b72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B72	18700 bytes
SHA-256: `422c4f1b8ce49a2bad5064ab2df80448ff4f857d80ac720e8fae67c1278daef4`

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