Malicious PDF — malware analysis report

Static analysis result for SHA-256 089fc2f8e848a75d…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 10:34:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 16cc1233167c04f3a666b00d5a3a9da1 SHA-1: 855c73f445a7d984e8de2cb93f2003461b0615e9 SHA-256: 089fc2f8e848a75d40f46ea1f16b20ccf8bf14c5481978710a32ac220e330bf6
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.online/app/431946152/how-to-buy-robux-for-free-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-promo-codes-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/what-tiktok-free-like_GM835599320.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-coins-coin-master-today_GM406889139.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_004_off000052bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BD 26808 bytes
SHA-256: 46cc8bb3aa730c77a7b269d6e8c956ced7cb44204de02724464af21359891d67
font_01_sfnt_off000091af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91AF 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00009bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBE 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866

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