Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5fcad49b24d5d1…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 05:54:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 305239bd24b6080cb78aaaab49b1d38b SHA-1: d08088eddbdfb5bd9925e3faee305e6839d6750c SHA-256: 3f5fcad49b24d5d11896454c9648e7a62dd9f0e34dd3b0e3044a1b3af3acb263
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and rewards, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a download button lure further support this. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a site that likely hosts a second-stage payload or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-rewards-site-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-coins-no-survey_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.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_004_off0000504a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504A 23964 bytes
SHA-256: 3dbe96e75fdc8cd2a06eba16d898d00d276295c421a6fc8e7e27ce98aa071c69
font_01_sfnt_off000086b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B9 18572 bytes
SHA-256: f83ae0dbfbb45e04c8caacad03ed19fd1097c60103a53bce71609c90e4e6ea01

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