Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea65c8416127231d…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 14:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 10f10553efd4a70a95dc01ca6e500656 SHA-1: 5ec5caabdbb1722b4f446c1b4b62f5654b4b8d05 SHA-256: ea65c8416127231ddd4fb47c5bb9e3f4fce5438c2aea7e375557cdbbd3945cf9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items, such as 'free abandoned Roblox accounts'. The document body and heuristics indicate a redirection workflow designed to lead users to further malicious content, likely for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-abandoned-roblox-accounts-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-pro-tv_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/codes-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/quel-touche-faire-pour-avoir-lz-free-code-dans-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-bird_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/pokemon-go-free-999_GM1094591345.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-barbie-tips_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-profe_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-accounts-step-by-step_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_off00003008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3008 22556 bytes
SHA-256: ce593061e45053c9516b89f68c83914d805659f653e4799267ea096cdfebbff7
font_01_sfnt_off00006270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 19068 bytes
SHA-256: c772d340dd62f383e913e8613718b048404da70b4ab638279b05e3c26422330f

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