Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3faf559d462f37…

MALICIOUS

PDF

44.9 KB Created: 2021-06-10 23:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c859445a8166a51fb0deb31f292527ee SHA-1: 66ec9acc07529086fc2f4f1056ad31c0ebee8f20 SHA-256: 1f3faf559d462f37cf6ff264945b73a71f2bbe5aeccb5c6a4d810c983781dfd0
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 0.9865

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.tw/app/431946152/how-do-yoy-get-robux-for-free-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-jump-hack-download_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-shirts-templates_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_off000053b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B2 24984 bytes
SHA-256: 61261a5ba945887e6a194c8f88da60c15af96f3bcf64fa02b76d6a425ee0013f
font_01_sfnt_off00008b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B63 18792 bytes
SHA-256: 6ed749713b7ff12d9f5bf1b9fcfd7873aeb59832b8a33810e11e62f5a5c60be8

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