Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb0ef4c24c6a81d…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 00:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 176f22baf038ffd88ec5afeede6cfcf5 SHA-1: 1483b9a884806dd8176946fa2d6f84954e42f3ff SHA-256: adb0ef4c24c6a81d58ad44cd377feed4a344ca489d80abb33a75c52351c14870
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators'. The primary malicious URL identified is https://netcdn.online/app/406889139/hack-coin-master-iphone-game-hack, which is likely used to deliver a secondary payload. The document's structure and embedded links strongly suggest a phishing or social engineering attempt to trick users into downloading malware.

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/406889139/hack-coin-master-iphone-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pokemon-go-free-legendary_GM1094591345.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/rbx-com_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_004_off000051c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C8 25360 bytes
SHA-256: d4ac492f62ec56107c0d7c9f881c9de39be180eadec8da3c0353ebe0787bd8ff
font_01_sfnt_off00008b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5A 18060 bytes
SHA-256: 98ffcaa8ac03649816b9da258085ae9fc6eae62b2f5ad3ff33c1336735992c31

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