Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52d85b2f81e384b…

MALICIOUS

PDF

36.9 KB Created: 2021-05-23 12:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4518c8946e7a258ac1ee0304cb0ef79e SHA-1: ade12e88c7db295df72850bb874d2bb16184b16b SHA-256: d52d85b2f81e384b0ca69312b467e5679c9f41bee602675464c98678ceefa925
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 0.9447

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/robuxy-com-free-robux-game-hack PDF link annotation
    • https://itv-grabungen.de/images/pubg-uc-vpn_GM1330123889.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-for-kids_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_002_off00003187.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3187 26268 bytes
SHA-256: 044b732109072e15748c1eff7ec7cb63e2bd8dbdd148483a4ebe1da74eba574c
font_01_sfnt_off00006e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 18452 bytes
SHA-256: 502ad6067225007cfeab5155f8ca615546b56d7ab4478b734f537abd02c25d18

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