PDF malware analysis — malicious · cd0d1d855ca345b5

MALICIOUS

PDF

32.2 KB Created: 2021-07-19 12:11:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: b9587851653ea013ebf5638e13e71965 SHA-1: 5b9267679b6d8f9e40632d40ca1b908288ce27c4 SHA-256: cd0d1d855ca345b5d63262f2595ad901347e4fc8350f59a89172581674e213a5

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising free Robux generators and game hacks. The document body explicitly mentions 'Roblox Free Robux' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent. The primary attack pattern involves luring users to malicious sites via deceptive content.

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/roblox-free-robux-game-hack In PDF document text
- https://truebibleteaching.com/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://truebibleteaching.com/images/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
- https://truebibleteaching.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
- https://truebibleteaching.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
- https://truebibleteaching.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://truebibleteaching.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://truebibleteaching.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://truebibleteaching.com/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://truebibleteaching.com/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
- https://truebibleteaching.com/images/robux-free-2021_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_off00002941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2941	22580 bytes
SHA-256: `8fe59b907f7de6d87eef577266be29831d26928466fc4a4e27227a7fa9d8f3b0`
`font_01_sfnt_off00005bba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BBA	18272 bytes
SHA-256: `ced743fd4e183934f0e9a866f4a508632ab3f4a3a6540ddcf16440f4ac9ef834`

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