Malicious PDF — malware analysis report

Static analysis result for SHA-256 918efa3fdc384e9d…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 17:21:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 64532150168c9409bf76af152b18a879 SHA-1: 4691e22db3dd50f865ca62c7f100ac0a1080b477 SHA-256: 918efa3fdc384e9ded8b033ae297a26656aee10c17a37fa8846e09d6e6198622
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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/431946152/rape-simulator-game-hack PDF link annotation
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-cool-outfits-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-play-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-hack-tower-battles_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/stella-roblox-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-making-other-people-chat-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/ciris-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-no-download-app-but-play-for-free_GM406889139.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_off000032ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AD 22464 bytes
SHA-256: ac59dd57d0a47565dbfae9c779c40b81d49fd5c9c3e9f4794b8e920ab47c537f
font_01_sfnt_off000064c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C4 18920 bytes
SHA-256: 58c83e080467578e58905a9b85faa4a4f16a861e4ecf2e508ddf789463ef2d6f

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