PDF malware analysis — malicious · f72bd71d59364fc5

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 16:43:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: d4f392ac514cef1cbd918eedb37e6413 SHA-1: 3c4b43edadfa7c36ccadfba91d775a53a33cad52 SHA-256: f72bd71d59364fc55aae51ed65c1f3c44b44547ffa893f8b9203fa81933f01f6

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 0.9796

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/406889139/spins-gratis-coin-master-hoy-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-hax-download-no-virus_GM479516143.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/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-generator-2021_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005113.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5113	29980 bytes
SHA-256: `0de2f4a8b8a4874eedd6843b59d76efd944c7fac0c55b68ec98d738ea1a4699c`
`font_01_sfnt_off00008fbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FBF	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off000099a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99A9	17900 bytes
SHA-256: `d9ca9c840088eace307b9f0f2308e23842d7b880bf99d309ad40adeb9b769765`

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