PDF malware analysis — malicious · cdfc379f3d0e3602

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 02:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 738f7e1dd973729faa840681e87c531a SHA-1: c808c100884b23481c485e7c5d1c57a9f4d1c710 SHA-256: cdfc379f3d0e360250af2470d4e68c3f88aed7b056a4506c063990cf89b9a268

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 0.9980

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 http://netcdn.tw/app/406889139/free-coin-master-account-game-hack PDF link annotation
- https://goodtools.tw/upload/files/free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-download-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/mining-simulator-hack-roblox-anfr_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-hack-dragon-ball-rage-roblox-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-roblox-script-injector_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/robux-now_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-quote_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/hack-roblox-hack-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/archery-master-3d-coins-hack_GM406889139.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_002_off000033e3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x33E3	22876 bytes
SHA-256: `9645497c04ceb70ee758a5fc34b6d54e00957f984546b2c3ec3e9acb44b6f967`
`font_01_sfnt_off00006702.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6702	18140 bytes
SHA-256: `ca77f048189f6b42c4087a98757a7b7ee8d42f0b46b1d7450a305d57abf2558b`

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