Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b83ce09d1dd0d5…

MALICIOUS

PDF

46.7 KB Created: 2021-05-13 21:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1c652cca73fd7d3f8e4082a19d6be465 SHA-1: 5ac6d9ef2746a05111e20e0c411915b015804e0e SHA-256: 67b83ce09d1dd0d5cd48ed762fc757dde1b572a0b8dd416a234fa410813b1d08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. This link, 'https://netcdn.xyz/app/431946152/free-roblox-followers-game-hack', is designed to trick users into downloading further malicious content. The presence of multiple embedded URLs and a visual download button further supports the malicious intent of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-roblox-followers-game-hack In PDF document text
    • http://ff-klaffenbach.de/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/my-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/roblox-pics_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497E 25736 bytes
SHA-256: 5669f260298ff7720015bf743ab6f5c510436792de676f98cc5d00f7893cf3ad
font_01_sfnt_off000083f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F1 4760 bytes
SHA-256: 3af2f13196cc0db0e2dd246298c6bada11d0d5985e1ef3430d240ab56c4d18af
font_02_sfnt_off0000945d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945D 18112 bytes
SHA-256: ccd38d5c4d6902a87b59ff7236a25d6da26946ef77410ea8fc3c9751fa4e7a37

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