Malicious PDF — malware analysis report

Static analysis result for SHA-256 590bfe4911136bb0…

MALICIOUS

PDF

35.1 KB Created: 2021-05-22 03:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c1cb7ec8347a14fd75b728494b4b38d1 SHA-1: 111d2301711a5d60316ca7ef460564bd67eecf39 SHA-256: 590bfe4911136bb0dc09f151b1834abf87735dabf75a1106633f97432a1ea147
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 0.9648

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/479516143/can-you-make-a-minecraft-server-for-free-game-hack PDF link annotation
    • http://avd-weiden.bayern/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://avd-weiden.bayern/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://avd-weiden.bayern/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://avd-weiden.bayern/images/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://avd-weiden.bayern/images/blox-fish-free-robux_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_off00003195.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3195 24272 bytes
SHA-256: d2cd12a3ef813bf382fda8381c4c578ac1bfa3e413c5a6097e331106f3e66a13
font_01_sfnt_off000067d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D4 18296 bytes
SHA-256: 7b2a5025a6b2eafbb08597cb19c0e2dd24287b9ce61b32a45f1f6eb7f3859dea

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