Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbee98aa3eed2e24…

MALICIOUS

PDF

35.0 KB Created: 2021-05-22 17:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b9f4400157ae6a63c2839bcaf20f87da SHA-1: d9365f70a44233ba735e01f530cd2ef91189357c SHA-256: cbee98aa3eed2e24bc9da40702ae93d5d92426bed9f4e24e00d17fc878da94a5
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 0.9508

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/835599320/free-tiktok-hearts-game-hack PDF link annotation
    • http://abst-brandschutztechnik.at/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.at/images/minecraft-free-download_GM479516143.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_002_off00002ef0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF0 25492 bytes
SHA-256: 196f51892db820555e6b175441056f3d36b736e1e9c58fa004cfba0c053dfffa
font_01_sfnt_off00006932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 17684 bytes
SHA-256: d2d02d8ba990aafabbf3c8139bcf1f40ce6ab80109d0e8cf226d19766131c391

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