Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb7b63203576df4…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 02:52:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 901985230ffb53859d72a4a91092dfd4 SHA-1: 28246dfcda1f8edae57e74dd81e85f9f8d7b44d3 SHA-256: 1eb7b63203576df47cf19f138554432091ea1fe49d55516f1219ce6d3e9290b8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/free-robux-codes-no-verification-2021-game-hack. The presence of a 'password-protected archive' lure suggests the document is intended to trick users into downloading a password-protected payload, likely to bypass security scanning. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-codes-no-verification-2021-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox-followers-generator-2021_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_off00002fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEA 22064 bytes
SHA-256: 4ffaaf9d45e07f31f6681b512cef09bbecd2ecc4f2e93e65038272a653e907cc
font_01_sfnt_off000060ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EF 19648 bytes
SHA-256: c9b5e446bd4f49308c598e64be383601662d64f1913011d813836102a9eea03a

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