Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84ac2a95d198115…

MALICIOUS

PDF

33.8 KB Created: 2021-05-22 14:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: efec3471efc5d30e7d5a46e7a25e3b91 SHA-1: 07d3ad7a20c713dc766d63410223ccc4ef95f08a SHA-256: f84ac2a95d198115a3394d6216ac7cc42fcc40d9acf487e992f0b33ed9644d83
122 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 brand-impersonation credential phishing. 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 0.9509

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/835599320/get-free-likes-on-tiktok-game-hack.
  • 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/835599320/get-free-likes-on-tiktok-game-hack PDF link annotation
    • https://hassel-event.de/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/pubg-uc-xyz_GM1330123889.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-heaven-free-spins_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_off00002edc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EDC 24088 bytes
SHA-256: 2da668006017b3efbe2e8ea11fdb6c1299d0c1b469dacc8e729cf5a5ccb94742
font_01_sfnt_off00006536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 17456 bytes
SHA-256: 782ce757928ab8849be8d7d6232199a595fd3f8ee03de5cb15c7b9ee803e6cfd

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