Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd9416de4445ac1…

MALICIOUS

PDF

9.5 KB Created: 2021-07-06 08:18:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 28b37edac4e3500b3e2cc0a0ae6406a9 SHA-1: 180c38e095605524979b5b8905c0c73d7574b352 SHA-256: 5bd9416de4445ac1b9fcf2766da53ad3f336eb86f250aa38beed71fbc1b875fc
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering free in-game currency and hacks for popular games like Roblox and Coin Master. One of the links points to known malicious redirector infrastructure, and another uses a raw IP address, indicating a high likelihood of a phishing or malware distribution scheme. The document body, though partially garbled, contains references to these lures and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-offers-game-hack In PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfPDF link annotation
    • http://202.56.165.220/digilab/repository/roblox-hack-tool-download-robux_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/how-to-hack-games-using-check-cashed-not-roblox_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-roblox-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/get-free-robux-legally_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-hack-side_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/code-for-robux-free_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/roblox-robux-hack-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text

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