PDF malware analysis — malicious · baa8e3f571aa4a3f

MALICIOUS

PDF

33.4 KB Created: 2021-07-10 00:50:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: cd55014c1ecb1fb72669175303ac26d7 SHA-1: 1cb306a4bcf407b0cb4a46919be0e8f5cbb89773 SHA-256: baa8e3f571aa4a3f72f68f2375903539284aa4ecd39d8a5b06badfef3a587ce6

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/free-hair-roblox-game-hack PDF link annotation
- http://www.repion.com/uploaded_files/userfiles/files/hacks-for-roblox-on-mobile_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/free-roblox-money-cheat-download_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/speed-hack-roblox-link_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-march_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/roblox-cheat-engine-2021-jailbreak_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/boostgamesnet-roblox-free_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/fd-hacks-roblox_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/is-roblox-free-on-switch_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/como-hacer-hacker-en-roblox_GM431946152.pdfIn PDF document text
- http://www.repion.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_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_002_off00002ebc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2EBC	21644 bytes
SHA-256: `67b28b43b32b857ec1de284c491cd6cd57ec00c4cbbcf907539c92e321439e06`
`font_01_sfnt_off00005e67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E67	18768 bytes
SHA-256: `bfcd366ce67bb3a5d8713789ef7bf981c9f928b16e2d1e07951b57f19bd099a0`

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