Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b258a8a2885256c…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 21:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f430f78f3c6481a6697db85ff6240adb SHA-1: de160b0d234abb051659b3851cd476e9426bf508 SHA-256: 0b258a8a2885256cca1857f9a8159d577aeaeaa6017aef661e83b714edb2a66e
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/479516143/minecraft-pe-free-download-ios-no-jailbreak-game-hack PDF link annotation
    • http://pustakasma.nurulfikri.sch.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-robux-easy-zephplayz_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/i-think-my-friend-has-been-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/robux-hack-meme_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/hacks-to-the-game-on-roblox-cadet-promotion-course_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-without-human-verification-generator_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_off00003275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3275 23084 bytes
SHA-256: 0fb60e9fb58a7e3baceb106c1c148543ea0358bc2921f4474d7405bbf4c6fd11
font_01_sfnt_off00006621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6621 19224 bytes
SHA-256: 4a2fe7980ad8b3ad4d8cb6004e5c28d9277f5a5bc6f0aacbb0f40e44ef4da637

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