PDF malware analysis — malicious · c8dda06fb1362236

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 11:21:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: b7539306fc77c2017e8e258b15ecbfa4 SHA-1: bbc8df40cf4e8c8ded6c193fc6a62ae44d9587a6 SHA-256: c8dda06fb1362236cd09ce54be5e8aaca2e04d2bfca2034163a32d8f9240eb23

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/431946152/game-give-free-robux-game-hack PDF link annotation
- http://foo.com.tw/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/hacker-00-roblox_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/coin-master-hacks_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/is-tiktok-free-to-download_GM835599320.pdfIn PDF document text
- http://foo.com.tw/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/can-you-get-hack-in-roblox_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/robux-hack-us_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/top-10-best-free-tshirts-in-roblox_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
- http://foo.com.tw/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
- http://foo.com.tw/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
- http://foo.com.tw/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://foo.com.tw/files/minecraft-coins-free_GM479516143.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
`font_00_sfnt_off00002af0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2AF0	21852 bytes
SHA-256: `f1e17997b9512da661c08b6e222011c9700a78167b61f4e4ef9ce3da2c99a1a8`
`font_01_sfnt_off00005b06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B06	19208 bytes
SHA-256: `69813dd6a6bd245aee50b944f0193d6275a7494d00db293a689fcf826d12d1cb`

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