PDF malware analysis — malicious · 38bda6cba73fd2f5

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 13:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: e6af767498c90f94b2005c2c25c690f9 SHA-1: d957dec2732de53815fae852140c4649448612c1 SHA-256: 38bda6cba73fd2f5a0259ac7e1f5b1ed188195518d247b258c38b67653fa74ed

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-links-for-free-spins-game-hack PDF link annotation
- https://www.mescosa.com/uploaded_files/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-generator_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_off000049ef.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49EF	26772 bytes
SHA-256: `5a88f8e57bcb3ccfe92d4fba87f20ffdf442bf7fc9b4000224ebe9687effd2b1`
`font_01_sfnt_off000087db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87DB	18056 bytes
SHA-256: `95118de0f1fa2d9d8d6d34d7ce9f6e9c56d43c25fce4d2a4bd556d275959b9e0`

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