Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec81af04bd1d65f…

MALICIOUS

PDF

40.7 KB Created: 2021-05-17 08:24:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5caf37299f786d2b5a31afa4f9507389 SHA-1: 5267fc9adda5b16b9edfb15c0713d717ecdb9362 SHA-256: eec81af04bd1d65fd03134ace388bd84cf5f7be2c1d13f0167e8ab1f67807f4b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising game hacks and free spins, which is a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

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/moonactive-free-spins-2021-game-hack In PDF document text
    • http://forsan.edu.eg/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/wurst-mc_GM479516143.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://forsan.edu.eg/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://forsan.edu.eg/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-hack-coins-in-archery-master-3d_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_003_off00004478.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4478 24344 bytes
SHA-256: 2c01f3097d4149e6f1ccff8dce1a6b2bae67846553ad41875bbceb60ce42137f
font_01_sfnt_off00007bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFF 18400 bytes
SHA-256: 92ca299d7509cbf0a27ca4bb2455c3f9e24f9e6a05476c47560d59a1eb9d663e

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