Malicious PDF — malware analysis report

Static analysis result for SHA-256 42be59b56f8cc345…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 09:16:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8f9f655e4c866a63623e7e1544d8ed97 SHA-1: c49e4188960c290cc7b395339df97f0724703953 SHA-256: 42be59b56f8cc3452ea4390a6de36d821af7f49f66584f88027186a5eb32f9b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 trick users into visiting these sites, likely for further exploitation or malware delivery. 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-computer-hack-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/roblox-hack-999999-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/cheat-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/royal-navy-ships-free-models-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-windows-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_off00003170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3170 22468 bytes
SHA-256: 9fe45a955ff761007cc40911ff8cce6bf624ea508d6b8bd48e16b3e9db470bba
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 18580 bytes
SHA-256: 497b785ebba59e7ca707536904f047f4e5286b620765a069de1dcc264aa1dd4d

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