Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9908501d8b80bb…

MALICIOUS

PDF

41.0 KB Created: 2021-05-17 17:45:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fba5714ec08dd608e433926f5cc76a2c SHA-1: 6bbe85313e6d79e35555d482baccdd9e9c34ecec SHA-256: 3b9908501d8b80bb561a640d9d39ccf3fe9423fc26cdc155d69a232468713c14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering game hacks, indicating a lure for users to download potentially malicious content. The ML classifier also flagged this PDF with high confidence. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to harmful sites.

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/real-roblox-game-hack In PDF document text
    • http://bau-lk.de/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.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_off000046d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D6 24360 bytes
SHA-256: 047bb673f6038fc50781f3622bf6b642ac5d1d656abbf0770f75a3cd5dc685b3
font_01_sfnt_off00007e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 18012 bytes
SHA-256: fe6948f8d9aae314f4e598887823c268b1dd75a45433b0d72710ef933c851efb

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