Malicious PDF — malware analysis report

Static analysis result for SHA-256 87822b9f1f66bcbd…

MALICIOUS

PDF

34.0 KB Created: 2021-07-08 01:13:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b660db5da1567ffb03ae441f92f0023c SHA-1: d9bf2e00b737b488d5a8db0f8b79f72665c6155a SHA-256: 87822b9f1f66bcbd995bcad93d8ccfa821866f6d1d6ef058188383f515a57174
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-spins-apk-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/free-catalog-items-roblox-2021-december_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-hack-a-server-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-robux-pc_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/official-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-get-free-robux-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-instantly-no-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-gift-card-codes-2021-not-used-england_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-modles_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/new-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-welcome-to-the-neighborhood-of-robloxia-v4-free_GM431946152.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
font_00_sfnt_off0000313f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313F 22128 bytes
SHA-256: 3aa42c5998c256d900aaf1bb3ab479044add4ab94695b713120816bfbe8fb167
font_01_sfnt_off00006233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 18180 bytes
SHA-256: 1e953b72540ec4677b5f3a09436cf02581c7252e246dbe5ac414cafa51ba2d5d

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