Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc12df880862f48…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 17:23:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a43eaa5ce778263325eaaf55e3a867cc SHA-1: 3d893e9af5eb0b4ffbb845cc7e15bb58ddccb4f9 SHA-256: 5dc12df880862f48a84dc185515213ea11fbde8e6ea2a75d8e4fbba8ffbea8d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-without-offers-game-hack. This lure is a common social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the 'GAME_HACK_REDIRECT_LURE' heuristic strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-without-offers-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-event_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-com_GM479516143.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_off00005182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5182 23848 bytes
SHA-256: b1732440e9393574903cf20c853ae224b430e28639b4f09706212a059703b14a
font_01_sfnt_off0000875d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 18600 bytes
SHA-256: aefc65dd28f007a3f9b16d2e7d3f040b6593358131967176ac90892bab7f0013

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