Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0d37794fc5085e…

MALICIOUS

PDF

33.9 KB Created: 2021-05-25 06:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9fc7a8e01c027a3f69c04c382d1c7ea9 SHA-1: 58214dec9c91996a721592f462f0524910db1cb7 SHA-256: aa0d37794fc5085ea921e98ae1cde8d055eb818556a95c4778d136f362a031e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks'. These links likely lead to malicious websites designed to trick users into downloading malware or providing sensitive information. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

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/835599320/freer-pro-tiktok-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-that-actually-works-2021_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_002_off00002f8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8D 23528 bytes
SHA-256: 4968debe99f473809585e6c1b1c842d4e06daffb4dc6e48f24ce33c46232ab7e
font_01_sfnt_off000064ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 17612 bytes
SHA-256: ce89ed17beb43e5874c760a665d90bca09271831bf209f2f19e5d757293baf95

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