Malicious PDF — malware analysis report

Static analysis result for SHA-256 68034a0474b3bd61…

MALICIOUS

PDF

35.1 KB Created: 2021-06-21 08:52:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f0b57b987416e3fd22bb6fc5a821f0f0 SHA-1: 2706294a26c5781ce8a6c1e3b3c82158bde43bdc SHA-256: 68034a0474b3bd6154b85a3df4d666364e194dc0b945186b0a20bd53e2a5c311
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.co/app/406889139/how-to-get-free-pet-food-on-coin-master-game-hack PDF link annotation
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/robux-codes_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/como-hackear-coin-master-en-espaol_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.

FilenameKindSourceSize
stream_002_off00003310.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3310 22724 bytes
SHA-256: dc5c0cf715a8fed0f1e8ec2ed12cc7a5a7128eab9ee4da9e5e91221995e1d824
font_01_sfnt_off00006600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6600 18492 bytes
SHA-256: 7fed4562ba490980d32b753115adbbbf587e09585f87f2f3eab3679b69c69736

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