Malicious PDF — malware analysis report

Static analysis result for SHA-256 1550c610fc0e26a8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 07:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 51f6b7be0a5930fd68621377b3129eec SHA-1: 733d38e94cabdb6b27d308881a145162d5706ea4 SHA-256: 1550c610fc0e26a8715709926aab5352723ceb9d420f5c8ab7cf07ebe0f14988
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a free generator or game hack. The primary link, http://netcdn.co/app/431946152/free-avatar-animation-roblox-game-hack, redirects to known malicious infrastructure. The document's structure and embedded links suggest a phishing or scam attempt, likely to lead users to a site that may host further malware or attempt credential harvesting.

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.co/app/431946152/free-avatar-animation-roblox-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-cheat-glitch-jailbreak_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-a-free-roblox-group_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-pour-roblox_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_off00003142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3142 22360 bytes
SHA-256: 095bfc5eb43642d1f171d71d3d26b82606110a0e27b59d5d16c583d32624ecc9
font_01_sfnt_off0000631d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631D 19248 bytes
SHA-256: 66eb4899f70d71f3bcd1cd3565eaee6617194b606208667c929a6dc0b01e6620

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