Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b60b05aabd613a…

MALICIOUS

PDF

43.4 KB Created: 2021-05-02 18:02:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6187bf651c5a0d7f2a7f2e44f7019397 SHA-1: 9f090c75ae0cf5f48878fa35377a6568532c03a5 SHA-256: c0b60b05aabd613a22f55ef6939905779355683c771acaa05f5ccc6aae5607d0
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/hack-skybox-roblox-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-geld-hack-deutsch.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/prison-break-roblox-hack-script.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/change-roblox-name-for-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-kingdom-life-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-with-no-downloads.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/cheats-for-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-2021-no-survey.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-para-jailbreak-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/robux-hack-pastebincom-raw.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-legit-no-survey.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_off00004524.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4524 29644 bytes
SHA-256: 843580c61725fb6b940179fc153597d1058d5e8fef13b5de8737fc090436b132
font_01_sfnt_off00008793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 18360 bytes
SHA-256: 20052923d80b2e34260239c9dfb1c9cfaa3bfa95c695eda0e114dc564672a2dc

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