Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3178fb1f24632d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 23:58:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 65ccb90e424c1902b6b5d0f72405f6f2 SHA-1: 70336ce7688a5114fbea4f03546ec196c572b4fc SHA-256: ef3178fb1f24632d2480df6ee7cad55487bc2f94905bba07a6cab5660483af80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game items and hacks to entice users. It contains multiple embedded URLs, with a primary link identified as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt, likely leading to further malicious content or malware download. No scripts were extracted from this sample.

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/431946152/free-roblox-clothes-and-hair-game-hack In PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/roblox-hack-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/freetako-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021-synapse_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/roblox-free-clothing-groups_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/free-roblox-accessories-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man2smd.sch.id/__statics/gudangsoal/files/cheats-for-roblox-ben-10-universal-showdown_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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22052 bytes
SHA-256: 308f8ec450b703d31826589b4cc2976e6ffb8194ff36f6f06ad985f047bea96e
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 19216 bytes
SHA-256: 7e2ba9ac97b995c4042039eded303f1a68f0b8ee29cce668a26419cd3902f156

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