Malicious PDF — malware analysis report

Static analysis result for SHA-256 d589a0cc001f5189…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 14:06:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 19f686210bc0d76034a136f2632842ec SHA-1: 9ee950c721998b6f4fc3951042e3d26c3a68e68d SHA-256: d589a0cc001f51890da5cf4bcc8ce29bef1de176a5e744434a044bb3a9532718
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and embedded URLs strongly suggest a lure to download potentially unwanted or malicious software. The ML classifier also flagged this PDF with high confidence.

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/406889139/coin-master-guide-to-free-spins-and-rewards-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-client-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-a-lua-injector-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-medieval-warfare-reforged-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-insta-arrest-hack-jailbreak-pastebin_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-exploit-nonwearedevs_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-obby-limited-time-only-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
font_00_sfnt_off000035f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35F6 23076 bytes
SHA-256: e67c43d332b73ee5e6b419ec4647d0d8ae25290a8a21529af69d4bed99cc3100
font_01_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 18652 bytes
SHA-256: d7653f79f3d999234835f2a00f534472d654b5fa855fc1c5b5099d4711ddd848

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