Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cdf3802f0550ce…

MALICIOUS

PDF

40.6 KB Created: 2021-05-10 16:01:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4892e7b7498a373881b3cb2fc0928be6 SHA-1: 88aced68486d1b3ca05e743c855f7ed8376d6a17 SHA-256: d5cdf3802f0550ce3160019e0aa93acf3c29e9ad962aa453793e5337d979520b
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 0.9945

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/robux-free-gift-card-game-hack PDF link annotation
    • http://stroygrad-spb.com/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://stroygrad-spb.com/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003ed2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3ED2 26000 bytes
SHA-256: 7fddfc6a3c4897b8b5ddffa9b32ded2cea7242c2f71007dc6c06a01f173ead76
font_01_sfnt_off00007bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 18640 bytes
SHA-256: 299b54e9041e0eacb2b5f4a1a09a85f1fb6c0d753f38c204f1d1c9ff56031a85

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