PDF malware analysis — malicious · 8e5583bacaff7b8b

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 23:08:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 3d1205de2efb5822a508e7a97c2bd2af SHA-1: 928864b02abf9c24adac3668fef8f3f58ad2ddaf SHA-256: 8e5583bacaff7b8be8a92009d1f4de3cf28c576b246f1302148a39788cfbf92d

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 5

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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-robux-link-game-hack PDF link annotation
- https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-mining-sim-hack-pastebni-december-2021-pastebin_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-thomas-game-online-free_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-assassin-aimbot-hack_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/script-hack-roblox-download_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-csgo-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/how-to-do-a-dick-hack-in-roblox_GM431946152.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-hack-com_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
`font_00_sfnt_off00002e66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E66	22124 bytes
SHA-256: `bac73a61deb788b2273d56882f80bbeda092598bd4bb597c41fe47977265157c`
`font_01_sfnt_off00005fa8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FA8	19008 bytes
SHA-256: `a11a737a93c2cddb47bbb5a91c346e1b782ee8df03973ee462993f1f8904f3c0`

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