Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7739d1e777a457…

MALICIOUS

PDF

227.6 KB Created: 2021-07-05 18:50:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cf8659276b5fd558ed83b6743a7a1105 SHA-1: 1a654d6b70464493721bcb0c74fd8cd9b5c91047 SHA-256: 4e7739d1e777a45724d0a90bd51b8f41518d429f10a018b1f7791fd2657f7cff
132 Risk Score

Malware Insights

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

The PDF document employs social engineering by presenting a fake CAPTCHA and a browser extension installation lure to trick the user into executing malicious content. The embedded URL points to a resource that likely hosts a payload or further malicious content, aligning with a phishing or malware distribution attack pattern. No scripts were extracted from this sample, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-evolution-trade-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-use-speed-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-price-in-nepal_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-someones-account-on-roblox_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
stream_023_off0003218e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3218E 25576 bytes
SHA-256: 00bb2ca1678c944ac9f2bb2253fee38e829f303933ce27c1241cde057f88786d
font_01_sfnt_off00035d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35D93 19084 bytes
SHA-256: da1324cd522fc96a648964ac26d06b87467122fcd882521ac58d814cb7966c5d

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