PDF malware analysis — malicious · 30e85992df6f2a4d

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 21:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 4caebfa1d591617d20de7d84981a786c SHA-1: 6c001b661cf1f1a66cda4c6550cd2429150426ad SHA-256: 30e85992df6f2a4db62c5d9277309a6bf2f16cbadd7b197275d98aa4a1b59644

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'Coin Master Spins Free 2021' generator. The document body and heuristics indicate a lure for game-related cheats, which is a common tactic for distributing malware or phishing for credentials. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-spins-free-2021-game-hack In PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coinmasterfree_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/freespinandcoin_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-robux-on-phone_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
`stream_003_off00004c20.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C20	24640 bytes
SHA-256: `30a9fe60effaed957f27baa2e5bbd33ae8c451e14ef613bf919edde19207055f`
`font_01_sfnt_off000083b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83B3	18288 bytes
SHA-256: `41f21d94c3c0473acc3506ca33b951da9505e1643d81a04a8bd875c9ca2f7515`

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