Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae300c06c1eaa359…

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 08:18:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a9e35c11317db6f47bbebcdc9bb7959d SHA-1: 5181f2c6c09d82ce33a8a5fd9a6fc22c9da1e48b SHA-256: ae300c06c1eaa359a8b012b468acb582b688925f4fbadb501f703e50047cb755
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, linking to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of embedded URLs and the nature of the lure suggest an attempt to direct the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/1094591345/pokemon-go-free-gucci-game-hack In PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B25 24012 bytes
SHA-256: fb62b14f3ce670cad16816d6ced81419c4d74e13a7b05dea6d78145e422a2af6
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 3636 bytes
SHA-256: 99dd96e89babb04aea0f0ebf99e33ebde901eaa524a16077e4ca0928c8dd6ae0
font_02_sfnt_off00008e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8D 18104 bytes
SHA-256: a5a1789f0090c479ab8b0e309775ce9018bfe2cc7200607efaaa5d3b0ff7d581