Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea25efcea8a359b…

MALICIOUS

PDF

39.8 KB Created: 2021-05-21 13:30:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 79a52007447dd2fe217eea07b8396889 SHA-1: 1a27b38a451e12d01ec31c167e2da61581d69d34 SHA-256: 2ea25efcea8a359ba6cc88f8272c72a774fbe2a1519d3fbcad55d378b995a89d
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 0.8060

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/free-spins-and-coins-on-coin-master-game-hack PDF link annotation
    • https://flyingchalks.com/ckfinder/userfiles/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003529.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3529 25176 bytes
SHA-256: 31e35d21de14464bab369c7345a7bbb663af9cca6d3a684173b6bdb9f654545c
font_01_sfnt_off00006f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F72 3440 bytes
SHA-256: b8401986b530bb748715f403a036b6408862a720222eb6968fe21524df2dedac
font_02_sfnt_off00007ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 18060 bytes
SHA-256: 64690fddacb88a1b87eb78a3bf181b542b813998c8d2539429c7660090ba79fa

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