Malicious PDF — malware analysis report

Static analysis result for SHA-256 d077490631227ede…

MALICIOUS

PDF

32.9 KB Created: 2021-07-21 18:13:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c1a57739c58eced8018eaf94519981fa SHA-1: 5f997c5158c3fcd0270769ed7b8fd92c15a05ae2 SHA-256: d077490631227ede64ca6e70b29f7a13a2d56d9d04d6ce7b4a5ddc9d5154d4ea
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including one that advertises a 'free TikTok followers generator' and another that points to an IP address hosting various 'free game hack' related PDFs. The presence of these lures, combined with the ML classifier's high confidence score, indicates a phishing or social engineering attempt. No scripts were extracted, but the document's structure and embedded URLs strongly suggest it is designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/835599320/free-tiktok-followers-generator-game-hack PDF link annotation
    • http://103.30.145.97/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdfPDF link annotation
    • http://103.30.145.97/__statics/gudangsoal/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_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
font_00_sfnt_off00002e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2D 22228 bytes
SHA-256: c49447d7cf11754cba2e4d090b65f6da9c67133e6b23d4a867cd342acfa563db
font_01_sfnt_off00005f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9B 17924 bytes
SHA-256: 15e81544c7296339f60406a70d440ba472803439c3c01f92585f07e7e66dad8a

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