Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4079aaf5ad529b…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 12:50:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 54759e6eb722d08b12e13f663ecbd2ff SHA-1: 4f6bce07213ca29e8652b91feec0e7ad29eaccf6 SHA-256: da4079aaf5ad529bd30244488aabf886d537da6616536850c92d1637f8fadcc1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure users. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content or download further stages. No scripts were extracted, but the overall pattern indicates a phishing or malware distribution attempt.

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/479516143/minecraft-building-hacks-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/pokemon-go-free-rare-candy_GM1094591345.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000549d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549D 24868 bytes
SHA-256: c6f8ca91ca047f3293722aa450619dfcfd1676811fa395a80c2bde642a6ecebc
font_01_sfnt_off00008d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D06 18628 bytes
SHA-256: 03be4b6b10a4c687c6c89c16a3bf013511456428a76c01e3ee63370f4522cf94

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