Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdb0ebfb814047b…

MALICIOUS

PDF

44.6 KB Created: 2021-05-21 14:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 261efd726d6293478dcd08b9b4d4bb04 SHA-1: aee36fcad91d9979e44e3d9e39934b6911769ff6 SHA-256: ccdb0ebfb814047b6063ad42769fdf7395bc8ff3418728625deae37cce800ad4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.7947

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/free-robux-gen-game-hack PDF link annotation
    • https://ccej.lviv.ua/images/robux-sign_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32DD 29524 bytes
SHA-256: 86795ace673194c0f3e6df0ada2ee6aba99c727f78c288b43672a696bb27ab93
font_01_sfnt_off00007444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off000081a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A1 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off00008d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D93 18012 bytes
SHA-256: b822dfaf3b200acc051a64c4c7a9b8bc6e1a7e93aa10f3c17b5d396512734dd6

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