Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f13e7fbbfa722fd…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 21:19:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7506927cee4cd0684e1e27115abbb50f SHA-1: 7c5e56f65d7908c527a9d43cdcaf1cfe00870e30 SHA-256: 8f13e7fbbfa722fd4552a6ffaa5b071436d6d9519e4525215ebf63c8f3a1f56a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency generators to entice users. It contains multiple embedded URLs that lead to known malicious redirector infrastructure, designed to funnel victims to potentially harmful content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or scam campaign.

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.co/app/431946152/how-to-cheat-is-guess-the-song-roblox-game-hack In PDF document text
    • http://kukuck.de/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/aimbot-for-roblox-free-for-all_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/roblox-install-free-mac_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-code-hack_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_off00003037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3037 21872 bytes
SHA-256: 19625c9cc525bd2ccc451bb90462179d58e10f79842c778d6647dcc6b0474e41
font_01_sfnt_off00006069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 19060 bytes
SHA-256: 712b7a1ef3d89644c134ac7235bf4382b6751af5b769dc572345c324a579ff23

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