Malicious PDF — malware analysis report

Static analysis result for SHA-256 918361158d9df603…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 23:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1800a1f95d93ee51a7586fd0e69d4df2 SHA-1: 609d2136103b085add4240344eec971304fecec5 SHA-256: 918361158d9df603e9515897cb641d14b3f7a5902959c2a181851f12845beac1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further malicious PDF documents. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

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/robux-hack-codes-2021-game-hack In PDF document text
    • http://ff-klaffenbach.de/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-hacks-for-roblox-apoc-rising-for-windows-7-pro_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/my-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-hack-walls-in-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/rogue-roblox-aim-bot-cheat_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-adidas-shirt-in-roblox_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/elemental-battlegrounds-roblox-diamond-hack_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/tik-tok-free-fire-kreatif-lucu_GM835599320.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-free-robux-and-it-actually-works_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22796 bytes
SHA-256: 6cbe5fbdac01de8e0cee9d466cbab16487d0e5bb494c2c77bdd16f3418793d50
font_01_sfnt_off0000631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 19112 bytes
SHA-256: 228814544ae20988c25536ccb1bf7108113c8913986f6acf5cc810f2819b5607

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