Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d98797607a5688…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 08:47:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c3b3eb973b9203723876ef3a4bb8afd SHA-1: 11bc0f9415ee84bb66384445975075eda9115e47 SHA-256: a5d98797607a56887234d022535279464fa26e408a66fc7fb424d70e671aa33c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to known malicious infrastructure, specifically a 'free generator / game hack' lure. The presence of multiple links to similar lures suggests a phishing or scam campaign. No scripts were extracted, but the document's structure and embedded URLs indicate a social engineering attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/corn-master-game-hack In PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-real-credit-card-for-roblox_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-roblox-recorder_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-wall-hacking_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-to-get-800-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-notepad-hack_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-northern-frontier-how-to-hack-pounds_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/flob-fun-robux-hack-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-codes-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/hallowen-simualtor-hack-roblox_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-can-you-get-free-spins-on-coin-master_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
font_00_sfnt_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 22592 bytes
SHA-256: c4feec70f2aaf1ac5456f4dd5218c4ecf1aa1a095aad29473f13f60f5ab9daca
font_01_sfnt_off0000614e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 17712 bytes
SHA-256: 41509af533672882fd3755f1c64e475e6570aae578b12919dea82aac6a418171

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