PDF malware analysis — malicious · c8b19cd5cc77bcb7

MALICIOUS

PDF

51.6 KB Created: 2021-05-11 13:09:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: c80ca0e4be9adbb768224785f1947b8c SHA-1: 672648390a2cd56a421f2588292e63022c898839 SHA-256: c8b19cd5cc77bcb7a5a264b32bd4f014d0f8954a5ecfe891ede0eaafad88956e

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 0.8646

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-on-phone-2021-game-hack PDF link annotation
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/is-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
- https://www.jubileeparkacademyprospectus.co.uk/admin/ckfinder/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004ecb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4ECB	26028 bytes
SHA-256: `646900fdd886cf729d0da7b4f402fbf904ad434b25d24ab44a4eeeb86f34c1dc`
`font_01_sfnt_off00008a4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A4E	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off000096f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96F1	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_03_sfnt_off0000a402.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA402	19312 bytes
SHA-256: `ee3ccdf346fecf17211ec9caf874d857695d657b5f92e2b1f0fe00576c016ffb`

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