Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5ec68c2b7773e2…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 12:49:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f5f76bbbdeebe788adc1e7af22a5e8ee SHA-1: 1cbcaa17d94519afe473c1c5e94dfe86644f5814 SHA-256: be5ec68c2b7773e2a5811cc372997082bf1e66cb8bd20dcadf28a80bc15dce2c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, masquerading as game hacks and generators, which are flagged as malicious. The document body and embedded links suggest a lure to download an application, likely a payload. The presence of embedded URLs and the nature of the lures indicate a malicious redirector pattern, potentially leading to further malware download.

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/406889139/hack-coin-master-apk-download-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pokemon-go-free-12-km-eggs_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-gamepass-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-like-generator_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-working-hack_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_off0000316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316E 23120 bytes
SHA-256: bb936e3bc9c6a6d6ef3f9cf4224f2672faf91b44e320c586572edbbd105d85f1
font_01_sfnt_off0000654d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 18760 bytes
SHA-256: 345ccc7577c06927ea46758c8888bad98130d585e1ba2acf6a86671e882058d6

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