Malicious PDF — malware analysis report

Static analysis result for SHA-256 467b5267cb4a2e13…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 23:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 78444a5ae491278253e8ea44dad00704 SHA-1: 337f716139abb3cc1d6398f2968001e1f5f66c1d SHA-256: 467b5267cb4a2e13230d293b2fa73b18ec453f4509eb169f5722f87c2758b7ef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-com-real-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to redirect users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-com-real-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://collectrobuxIn 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_004_off00005180.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5180 27136 bytes
SHA-256: a2b71a7fc34b3bb3b72e0ed0f31fbc5474747118442d167aa0da78ca953f3f82
font_01_sfnt_off00008f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F04 18576 bytes
SHA-256: a83edd52c2be056a67ce389c2e3103e44ea5f6bc4cdf4c28a35d8553f09f80ba

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