Malicious PDF — malware analysis report

Static analysis result for SHA-256 9141616f0184d03d…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 17:40:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7533f241131af0906ec1d2b1b87cae09 SHA-1: d1b7107cbd29ae4360e00b6cbaa7dca217ecab81 SHA-256: 9141616f0184d03d4f38b0f2c6826c708cf4451c1560749523d63e4af6567e5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free Robux' and 'game hacks'. The primary malicious URL identified is https://netcdn.xyz/app/431946152/bloxawards-com-earn-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure designed to redirect users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/bloxawards-com-earn-free-robux-game-hack In PDF document text
    • http://www.hhls.com.au/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn 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_off00004a48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A48 25172 bytes
SHA-256: 509f76059af75a77379ac0ad370035fbb992d3ed9190578dc36d95c2b6f9422d
font_01_sfnt_off00008486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8486 18916 bytes
SHA-256: ad6cfd8b97476ff22bd965746e6d59def3dc1c42c07a754b956efad1c533161c

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