PDF malware analysis — malicious · b863738da4af673f

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 15:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 54690cb21a4be451a5301e79665e6ff4 SHA-1: 33b1cbef756f0ebd14b59b0c3743623eaf3bbe24 SHA-256: b863738da4af673fab6a2dd24af6f8d004998ec96feb438a97f4c4fce7ee77ea

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/479516143/is-minecraft-bedrock-edition-free-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/worst-roblox-avatars_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_004_off00005182.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5182	25724 bytes
SHA-256: `5c318baae1f7e91363f5e2b0eebcbd553f90b0c4c075667de38d638a11aba402`
`font_01_sfnt_off00008c01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C01	18268 bytes
SHA-256: `c81a05c902e5b7336ce3afe221fe42e1a1247b419ae57a3dec90c8cc8a9629c1`

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