Malicious PDF — malware analysis report

Static analysis result for SHA-256 44556058f8bb3bf2…

MALICIOUS

PDF

32.0 KB Created: 2021-07-06 06:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e62b03b9cf2c1d795e4c23b699663fc5 SHA-1: a9c3ae7c26df9108d7368601e2868beea5062f92 SHA-256: 44556058f8bb3bf272bfee2f33be13927f979a781fd7e90df1357a4f9e91ec6b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/1330123889/where-to-buy-pubg-uc-game-hack. This lure is designed to trick users into believing they are accessing game-related content, likely leading to further malicious downloads or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/1330123889/where-to-buy-pubg-uc-game-hack In PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/my-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/como-hackear-perfiles-de-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/master-game_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/pubg-uc-versus-pc_GM1330123889.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-game-hacking-tricks_GM406889139.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_off00002724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2724 22512 bytes
SHA-256: 1a9dc99226a84434b0d981ffa1edd9f3657e30e6ec11ef62c9f946e23c3a916f
font_01_sfnt_off000058dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58DC 18812 bytes
SHA-256: b6b750af6bc97299e95772a2f485b19c2a3fd524972f1b68f43d3105c162f2ea

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