PDF malware analysis — malicious · 9ba7766a6ae46af1

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 05:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 48c80ac233efd509b28334085dbf821b SHA-1: ff6be2345f6d0a7d711841dde1ee6b46c086437c SHA-256: 9ba7766a6ae46af1966e958d444308d5d12e6181f0e59364392f7eaf62979db4

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free Robux' and game hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to exploit user interest in free in-game currency, leading them to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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) 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.online/app/431946152/how-to-get-free-robux-2021-no-human-verification-game-hack In PDF document text
- https://www.woundcare-today.com/uploads/files/files/roblox-hack-client_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/fast-robux-online_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/roblox-its-free_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-robux-stream_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-2021-robux_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/fbchampion_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
- https://www.woundcare-today.com/uploads/files/files/free-robux-websites-that-work_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_off00004fba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4FBA	24792 bytes
SHA-256: `7b8f57fb98d77616d1aa8f9f2e84b8f304888ce5ce1a60c2ecf20826e2a48b01`
`font_01_sfnt_off0000883b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x883B	19428 bytes
SHA-256: `dfc7ca414cfca4f80301273998e01ceb4bfd22e3de883fcbe9d6a0102e8d41a4`

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