Malicious PDF — malware analysis report

Static analysis result for SHA-256 811207ad2ce4b533…

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 10:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ef30b1f794358202e1661ecf38c2152 SHA-1: 77ba336901999ddeb61ba3cf1dd423f0b3fc6b2f SHA-256: 811207ad2ce4b533a36842e6c743db7c52ff1d4003b7618aedf5efbd5c5acbf2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting game hacks and free currency for popular games. The document body and embedded URLs strongly suggest a social engineering lure to drive traffic to these malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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
  • 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/406889139/coin-master-game-hack In PDF document text
    • http://caraless.com/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-robux-youtube_GM431946152.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_003_off000048a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A9 29704 bytes
SHA-256: ddcd64fc2326b2c732169537514b11b69f7c9973a4b0aaf528731bca4d715912
font_01_sfnt_off0000874d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874D 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d

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