Malicious PDF — malware analysis report

Static analysis result for SHA-256 571200900e33563f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 18:01:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c891834f19936b732b60f6dedca1b833 SHA-1: 7725ee9d3e4f96d13d0465ba1cb3b3b3ae03dfce SHA-256: 571200900e33563fc73a045a081976362607267ceed54d8675457c254df09908
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and game hacks. The embedded URLs and the document body text strongly suggest a lure to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely leading to further compromise or phishing attempts.

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/rbxboost-get-free-robux-online-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-chrome-extension_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/all-free-xbox-roblox-skins_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-gift-card-codes_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_off0000321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321B 22456 bytes
SHA-256: 15084eb4381690ee716572e9c8c3e285619c3c668efd7076278f6314e115b400
font_01_sfnt_off0000641b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 19012 bytes
SHA-256: 73ea212f309261252d5df1c40a3f318ea4e2350836cb32144fdefff01c0f9bf1

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