Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e8ce50cfb177c8…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 03:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2327ae876ef0e9344c5b1ad49e2897bf SHA-1: 48a4c5c6fb738dffd178d7100541024b8325e61d SHA-256: f1e8ce50cfb177c8d58e9eb49efa1325741e51e418c31462292fc4ac4b40fac4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a lure for 'free Robux' or game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates an attempt to lead the user to a malicious site. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or scam attempt.

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.co/app/431946152/free-robux-2021-no-hacks-game-hack In PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-roblox-gear-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/roblox-how-to-get-free-shirts-and-pants_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/el-mejor-anti-cheat-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-hack-roblox-accounts-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-exotic-hack-roblox-assanis_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/hacks-de-comandos-de-admin-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/how-to-hack-in-jailbreak-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/robux-hack-august-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-robux-without-human-v-dr_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/best-free-admin-games-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/easiest-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-codes-generator-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-robux-game-link_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_off00002fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA2 21916 bytes
SHA-256: 602fb8dc9abb16eae91691e1d235a17c0000edec41573474342931b74269ea64
font_01_sfnt_off00005fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 19288 bytes
SHA-256: 777b0e14666b1afbd5125190798830c3ed93cc4f3ab7f90f693ed7d83dad16bc

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