Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c3274b41c45745…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 13:25:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b33e051f8de207522b5c6a1a0554ef28 SHA-1: ed86a46e44d1518753aa6404969fc746a0c6cc0e SHA-256: 66c3274b41c45745db64f9a74f836a3a8e1451fd38cb69edcd27343d7963bb95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary malicious link identified is http://netcdn.tw/app/479516143/free-private-minecraft-server-game-hack. The document body and embedded URLs suggest a social engineering lure to entice users to click through to potentially malicious content or download further malware. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

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/479516143/free-private-minecraft-server-game-hack In PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/pokemon-go-free-96-iv_GM1094591345.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/free-robloxs-makeup_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/how-to-get-free-tiems-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/money-cheats-sims-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/a-roblox-hack-to-get-all-money-in-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man5-bogor.sch.id/__statics/gudangsoal/files/roblox-cheat-wearedevs-sourcecode_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_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22324 bytes
SHA-256: 8c013b4dad5111e8b0b56d434f9c767f3530fea016f6ee9d1359544e19c94279
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 18124 bytes
SHA-256: 211e11bb03f7cc83c5e2829b7d2ef769d4fa8cb325cdfd6bec5b2a0daef77f26

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