PDF malware analysis — malicious · d3ef89b195c61aa1

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 21:47:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20

MD5: 51984ae17ae8b9f33faf4905e5dcbd82 SHA-1: af7ca618cacf645c67c7b1b69c87f36c121e8448 SHA-256: d3ef89b195c61aa176b65eb57da72d063f3c993614cfb4d432165761ae579fa4

240 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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) 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 http://netcdn.co/app/431946152/free-minifigure-codes-on-roblox-game-hack In PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-install-sandbags-777s-eyeball-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-adidas-hoodie-roblox_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/tiktok-free-key-code_GM835599320.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/wizard-hacks_GM479516143.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/robux-hack-real-no-survey_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/hack-roblox-robux-sin-verificacion-humana_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/hack-robux-redboy_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/omg-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-promocode-hack_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_off000030ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30ED	22788 bytes
SHA-256: `c5b90cabb675be68b1e0c6a5e5ec6f04bcea48dadee2853fe6acc8f48965c17f`
`font_01_sfnt_off0000640e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x640E	19280 bytes
SHA-256: `3b31cabfd64b5e023be6665d5ce64ee0bcb466e382f77e5f012f3cfddf08f0c8`

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