Malicious PDF — malware analysis report

Static analysis result for SHA-256 5193be93681edf6b…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 02:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 903ea5cd03b94da792f6953886e2406a SHA-1: ecaa3c4d16a0219fa995375e62b5686f8a8cd025 SHA-256: 5193be93681edf6b4e33e088266cb4c4f4bfb09de420c4a99a9c89d710727646
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure and a fake-CAPTCHA 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 0.9971

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-get-free-robux-on-mobile-game-hack PDF link annotation
    • https://www.sitiwebjoomla.it/images/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/minecraft_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6F 24452 bytes
SHA-256: 9d20af2a3b3f3353d3e12008afb2fb57175b8f29f826602921c429452f89a9e9
font_01_sfnt_off00008263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8263 18672 bytes
SHA-256: 54aa4755d3d4fcbd00d11f20b69d4376192dec0a97bdc1376cf216d73564a968

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