Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9eb95274efcad3…

MALICIOUS

PDF

41.3 KB Created: 2021-05-10 12:30:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b028ebc2faf32e01864bb081175b8918 SHA-1: d6545518bf92c87a7aedeaf83e99751cb6d39029 SHA-256: 3e9eb95274efcad3ee151e1d6a2cc45b908d1ba65e424e3fa917dc774fc12387
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a 'game hack' or free generator. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-robux-for-free-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/how-to-get-robux-for-free-2021-game-hack In PDF document text
    • http://portaluniversitasquality.ac.id:5388/perpus/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://portaluniversitasquality.ac.id:5388/perpus/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.portaluniversitasquality.ac.id:5388/perpus/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://portaluniversitasquality.ac.id:5388/perpus/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://portaluniversitasquality.ac.id:5388/perpus/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://portaluniversitasquality.ac.id:5388/perpus/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.portaluniversitasquality.ac.id:5388/perpus/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.portaluniversitasquality.ac.id:5388/perpus/repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.portaluniversitasquality.ac.id:5388/perpus/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://portaluniversitasquality.ac.id:5388/perpus/repository/rbxoffer-com-free-robux_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
stream_003_off000041bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41BD 26180 bytes
SHA-256: e237f7cf6a9701c4e434ab4f11754b080f7b7aee4599fc6b6ce4b3c029ceecd8
font_01_sfnt_off00007e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 18684 bytes
SHA-256: 65f445f0396e54760dd2a1edc1744209422bc48f29c35ea74a9bcb72e79f8b06

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