Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d610b1c92a507a9…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 16:43:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c3d6d5d9bd367044003505a5c0872c7f SHA-1: 2b3beb45c66a0fc01b2f6d22fb0c20077246ea87 SHA-256: 9d610b1c92a507a9122a4222842cc3707650824eb4b5fbbfddcaa55d6f16cfba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is http://netcdn.tw/app/431946152/robuxmatchcon-game-hack. This suggests a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted, limiting the analysis to the document's embedded links and heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robuxmatchcon-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacks-for-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/download-roblox-free-windows_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-start-a-minecraft-server-for-free_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
font_00_sfnt_off00002e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0C 21184 bytes
SHA-256: da37b67993e8cee60a879c037010be73d1d32bccefa299c54d242d104663ab2b
font_01_sfnt_off00005c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4B 19084 bytes
SHA-256: 22fb853357d700a883506443e03244379ebe89dfe763389f41fb0df375e68649

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