Malicious PDF — malware analysis report

Static analysis result for SHA-256 044682005e02064d…

MALICIOUS

PDF

43.9 KB Created: 2021-06-04 01:14:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d78b04a2cfbfcd47f005b106d7c2136e SHA-1: 3bae7ec5807dc4005518fd6cb740f36c57196121 SHA-256: 044682005e02064d4b445349eafb7dd429da84316aabaf3e3216a49d167963ee
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 generator / game hack' lures. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs designed to lead the user to potentially harmful content.

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/how-to-get-free-roblox-items-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-accounts_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
font_00_sfnt_off000051d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D3 23928 bytes
SHA-256: 91fe6e3f330c9ac4c7157ab10cb64f427e7467f18d12d2e4586779397c1cb216
font_01_sfnt_off0000883f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 18476 bytes
SHA-256: 8f186cfffdac824b8af051e9c3258ff2c6bc2a624daaf9438b2e2390608ff8bc

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