Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba11a88e4d2abe1a…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 18:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 487704f097e91b526a2f1efea93499fd SHA-1: 0a96e1ecaaffd7fcee5c78f19e0bada34ee6c730 SHA-256: ba11a88e4d2abe1a3fce4c566bde16eb72e48b9e227000290f1238f71595715e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" or "generators." The presence of a visual download button and the document body's content further support a social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/robux-no-verification-game-hack In PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/static-moonactive_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-link_GM406889139.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_off000047f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F0 26804 bytes
SHA-256: 1dc2e0aa815039eaa45442e29fb72b076c56ac2ce0386c0a41314aa70240e37f
font_01_sfnt_off00008255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 18436 bytes
SHA-256: 7bd58a32436a1cd7e6b960dae53a6923ed98c563d453e9d292140b8243cceb65

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