Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbf7828acfdde54…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 22:56:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ce000f8cce407b3b2d6942f2c792e3c SHA-1: b0401117a92aca6e9b4d0ef0f8afffe33a737ee0 SHA-256: dfbf7828acfdde54ab35a9b0f6c58ec94d64c78d69b94042a7bf5339c4eea123
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and websites offering game hacks and free currency, indicating a lure for malicious activity. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to drive users to malicious sites, likely for malware distribution or phishing.

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/431946152/www-free-robux-game-hack In PDF document text
    • http://www.herricht.at/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/coin-game_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-daily-free-spins-link-app_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_off00004845.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4845 26112 bytes
SHA-256: d573d20b510e5dd28e801127d34b406b21ee72a26aca72d234f42d8a76431cce
font_01_sfnt_off00008320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8320 18376 bytes
SHA-256: 3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a

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