PDF malware analysis — malicious · b5118fa5cbc7fd11

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 01:18:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: e64ee510b6ed1d6e002e71e80d5410d7 SHA-1: 25c9c4c2b8b91016a68fe7551dcfcd20a4221ba4 SHA-256: b5118fa5cbc7fd11850c28d7b1bd0cda0708de6dbc5f188a40dcec44b26a8c69

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 0.9969

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.xyz/app/406889139/coin-master-free-2021-spin-link-today-game-hack PDF link annotation
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/master-coin-free-link_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/i-need-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-hack-generator_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-get-free-robux-gift-cards_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_off00004946.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4946	29632 bytes
SHA-256: `b74df6c027e620ccb040a4f7e88e4764a7b926b1f43beee3256404a9f0f826e7`
`font_01_sfnt_off0000878a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x878A	18812 bytes
SHA-256: `7f624a4da072bd42e21ae13ab081f80009d2c012a41e181bc6a40f65c236f9bb`

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