PDF malware analysis — malicious · 445e0ae093c43760

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 18:44:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12

MD5: a9eaf565259a42c5b07f72f6244cd499 SHA-1: f8f12999a7fc1c49ee9fd067123c6e47b8485b8c SHA-256: 445e0ae093c43760c5617234664565b217b6b1ac9ed6841726cf23db0f755ac9

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service that hosts numerous SEO-optimized PDFs, all designed to lure users with promises of free in-game currency or hacks. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-its-free-game-hack, which leads to a chain of further malicious links. This pattern is consistent with phishing and scamming operations.

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.tw/app/431946152/roblox-its-free-game-hack In PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-superhero-city-cheats_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-shirt-roblox-template_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-get-free-clothes-in-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/robux-cheat-codes_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/hack-de-una-espada-ra-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-can-i-get-roblox-for-free_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-brick-master-cheat-video_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-source_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_off000031ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31EE	21800 bytes
SHA-256: `25df29d46612e146abe9dcfc14bffa0d71445974986191c2b945e2362bda2f24`
`font_01_sfnt_off0000623f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x623F	18752 bytes
SHA-256: `8ce864c0d72f28d8a67e9dcb80c8e62c287a700018797dfd40197a13ba670f1f`

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