Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a342d453aa89d1…

MALICIOUS

PDF

41.5 KB Created: 2021-05-12 09:01:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1c483c1de2bdbd7141c798a0a2c4aa0a SHA-1: 695551c7c0fbb825e1a811d9cc6c1bfe219eb660 SHA-256: b4a342d453aa89d151600fb946836132730212812dd61731ca41a13f9a7f5861
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and IP addresses, disguised as "free generator" or "game hack" lures. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The presence of these links and the overall nature of the lures strongly suggest a phishing or scam attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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
  • 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/coin-master-free-cards-link-2021-game-hack In PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-get-free-robux-website_GM431946152.pdfPDF link annotation
    • http://103.19.59.42/__statics/gudangsoal/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/oprewards-login_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-unlimited-spins-apk-free-download_GM406889139.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_003_off00004771.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4771 24388 bytes
SHA-256: 71529a15b84eddd986c184469412a694b5aef441e1a07dd2c04be7d4dd74d4c6
font_01_sfnt_off00007f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0A 18456 bytes
SHA-256: b51790488d60a3c79421cfddad0a6ae9f074b26b8d27a704dda1d2d7bad48ec0

Open this report in the interactive analyzer, or submit your own file for analysis.