Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea602d4e5246eb8…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 19:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5dc431207fc02888a5535bc56dea2838 SHA-1: 01d94ef4990c877cbaf2a6eb04718e133d59014c SHA-256: 8ea602d4e5246eb86e33fa76da91db81b8c98f9e8bd0f2b80eee6894bd7ba9dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and text lures related to 'free Robux' and 'game hacks', directing users to the URL http://netcdn.tw/app/431946152/free-robux-no-verification-game-hack. This URL is identified as a malicious redirector, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/free-robux-no-verification-game-hack In PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coun-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/comment-hack-roblox-en-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/console-hack-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hacks-para-roblox-2021-descargar_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off0000319d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319D 23016 bytes
SHA-256: 3122836fbc9a4f8e4e51416a601ec722823a3c3c09d5f145ca4766af18093b84
font_01_sfnt_off0000651c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 19072 bytes
SHA-256: ace71d10471f941b47a74757ee9bffc2eb087028e16fd0b67ae59ecc13578840

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