Malicious PDF — malware analysis report

Static analysis result for SHA-256 333bca54a17c8ff3…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 12:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e4782bff45824e874b143e840c94db48 SHA-1: 4f8282ad426265a1ebb56d0c58a9dccf76581e6c SHA-256: 333bca54a17c8ff393d1fc93b52b2dd03a491c660178df21d73c267b5f6daa56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The document body and extracted URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/moon-static-coin-master-generator-hacks-free-game-hack In PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/exploit-hack-roblox-august_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-get-free-10k-robux-by-redeem-code_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnurulyaqingtlo.sch.id/__statics/gudangsoal/files/roblox-install-free_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_off000032c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C7 22812 bytes
SHA-256: cabe2bf9acca5cb8cc24e180da8d06ee8bbeee7ea106f4352cc227f8bf81e50e
font_01_sfnt_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 18168 bytes
SHA-256: 480988a8bf3c5888bd5ebbfc15eb41d8e157e9bfee1c85e44027bf0723b89683

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