Malicious PDF — malware analysis report

Static analysis result for SHA-256 4026f24cbf2141ea…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 12:51:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a7e96fc8fc32ee78b83c1a8cf149869 SHA-1: 6f3b1cf1bcec9a16a9988f19bb4858f3f7b5652a SHA-256: 4026f24cbf2141ead908ae3812465f9cb69477942eaa3870eb8413b1b3a46d2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings indicate that the document is designed as a lure to trick users into visiting these malicious sites. Although no scripts were explicitly extracted, the nature of the links and the ML classification strongly suggest a malicious intent to redirect users to potentially harmful content or further stages of an attack.

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/free-spin-hack-coin-master-2021-game-hack In PDF document text
    • https://perpustakaan.urindo.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/hacked-accounts-of-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-robux-app-download-pc_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/sysnaspe-crack-free-2021-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-free-robux_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_off00003156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3156 22760 bytes
SHA-256: 48f900ebd31faae56102629f30d3db1589f77474dfeba5a05694b1591f286a6e
font_01_sfnt_off00006445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 18748 bytes
SHA-256: 7df8ab728cdded3f8099f37aff2fc644c0b56c156b14cd18fe44a93e03dbf9eb

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