PDF malware analysis — malicious · 97a3de3d0d7f615b

MALICIOUS

PDF

46.8 KB Created: 2021-06-07 01:33:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 3bfdd0fcbad38747e852f2080f1d3e42 SHA-1: 07041433d820c6a2172e66f30ecf34d31595ac55 SHA-256: 97a3de3d0d7f615b22080f3f0460be8367fdabb2fda8c45fe4e3f3e75e5769e0

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that promise game hacks and free in-game currency, a common lure for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates these links point to known malicious infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest it's part of a phishing or social engineering campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

Heuristics 6

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.tw/app/431946152/how-to-sell-clothes-for-free-on-roblox-game-hack In PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-capatcha_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/hacks-para-roblox-jailbreak-2021-descargar_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/v3rmillion-roblox-hack-download_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-hack-no-scam_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-speed-up-roblox-with-hacks_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-glitch-july-2021_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-codes-for-roblox-wild-revolvers_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/roblox-hub-free-fiv-server_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/como-hackear-conta-de-roblox_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/como-hackear-roblox-2021_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-roblox-medieval-warfare-reforged_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-do-personalized-t-shirts-in-roblox-free_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/microsoft-free-robux_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_off0000542f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x542F	28332 bytes
SHA-256: `0eba041c88cfaecbf3a99e2dd5e1ad91c7b11d386e67278260bf50fbf7b87c45`
`font_01_sfnt_off0000942e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x942E	18384 bytes
SHA-256: `7155accbf6b996c8faf7daa84392b0c65c147589ddd7817a8c3c40168e4ad6b2`

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