Malicious PDF — malware analysis report

Static analysis result for SHA-256 90be0eac91e05c2b…

MALICIOUS

PDF

43.8 KB Created: 2021-04-29 06:22:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b479e514be76b7450a6be4df98ad4b2b SHA-1: 1b38450573b94f806319c6dc6b32b928d78d86f2 SHA-256: 90be0eac91e05c2bbdf86e94738e99105d6ead02572b1c86a8aaf980b0f5778d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action to "CLICK HERE TO ACCESS ROBLOX GENERATOR", strongly suggesting a phishing or scam attempt. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-hack-roblox-with-cydia-game-hack, which is likely used to deliver a second-stage payload or redirect to a fraudulent site. No scripts were extracted, but the PDF structure and embedded links indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-hack-roblox-with-cydia-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/infinite-robux-for-free.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/hack-para-counter-blox-roblox-offensive-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-apps-that-dont-use-adgates.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/citizen-hacks-roblox-jailbrea.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-without-verificaton.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-free-online-no-signing-up-or-nothing.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-website-survey.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-cafe-roblox-gropup.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-make-tshirt-free.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-legends-of-speed-hack.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_off00004409.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4409 30280 bytes
SHA-256: aa43903cb7a9f024213f8a8a564d4b203a96eefcaef8053eab47aeed008ea1a7
font_01_sfnt_off00008699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8699 19288 bytes
SHA-256: c0d69ce5f4dcae72131e8536eab88d74f54347b517bc06309536428d736ca52c

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