Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e28a1d886d2599…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 17:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a0c4bd4a16042dfd42a9d8165076d4b SHA-1: 48aa388818f55d1881acf4c16546576157fc8e52 SHA-256: 08e28a1d886d2599c6689c73af870bcce25e4f42402a0081843edb32ac23d7e3
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/835599320/free-tiktok-followers-app-game-hack PDF link annotation
    • https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-rewards_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_off0000316d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316D 25260 bytes
SHA-256: ecb81099e4682356dccb2fa1ef5316aa7f47ac0d6edb65e4a21f1e9688bcc2f2
font_01_sfnt_off00006ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE3 17872 bytes
SHA-256: 34129f1c56e014fb2604607ed740d581eed4f4cd55f156cb19b3173e06165e4c

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