Malicious PDF — malware analysis report

Static analysis result for SHA-256 191f740a33e57013…

MALICIOUS

PDF

37.1 KB Created: 2021-05-22 21:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1371721f63a8aadb98df2749886029b7 SHA-1: edac80928529d8e6a0dcfc36752e6328cc40ebac SHA-256: 191f740a33e570138edf37550b37985e29fe6ed238e309adb6dbe24ba03fb3ba
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/406889139/coin-master-daily-free-spins-blogspot-game-hack PDF link annotation
    • http://beagle-cindy.de/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-to-get-minecraft-for-free-on-ps4_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_off00003567.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3567 24728 bytes
SHA-256: 5c1ece2f2c16ec57dd408354547934c9a318947d31f8f2e247fdc319cfd6d715
font_01_sfnt_off00006e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3B 18812 bytes
SHA-256: 99efaab321cd8bd4771148dad361c5d136942e4fae15d22f58752892cb19a04e

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