Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e72d4bb4442d6a…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 12:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ba18eae8ec0e455b11ea47924dec3e8 SHA-1: 57923865f156abd1daff394925a2e131316a3eeb SHA-256: 18e72d4bb4442d6a2a1fb894f6f04a7b84cbe38b2578abefb3c5d0d276926838
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link to 'netcdn.tw' which is flagged as a lure for game hacks. This suggests the document is designed to trick users into visiting a potentially malicious site, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded URLs indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spin-link-in-coin-master-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-iraq_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/escript-executer-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-account-hacker-tool_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_off0000325c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325C 23128 bytes
SHA-256: 0f82bffc7520aa2344afa27cf3ac3b33d5bac33b7fe809a7a9b6b3d05ec15df3
font_01_sfnt_off0000666f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666F 18344 bytes
SHA-256: d3e962bcabbb5ef935488ecc7aa9e5e3fb65918ede879eb88a760949ba3de850

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