Malicious PDF — malware analysis report

Static analysis result for SHA-256 be446da1cef1485e…

MALICIOUS

PDF

47.7 KB Created: 2021-06-04 00:18:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b829a154a99b6527b7d21dd4f7b43d4c SHA-1: cb497de01d811b76662bd5e911590c619def48e5 SHA-256: be446da1cef1485ef2e1009dbb83f89aff7734fa2ce6468d52304d91e6da9d18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a phishing or scam attempt designed to lead users to potentially harmful sites. While no scripts were extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to exploit user interest in free in-game items to deliver a payload or conduct further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/how-to-change-roblox-username-for-free-2021-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000506a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x506A 25140 bytes
SHA-256: 1ed16bb20b2edfc1316bf3368a574f80b7dcc3d88a50c8c40dbe416c2e9afda3
font_01_sfnt_off000089ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AD 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9398 19644 bytes
SHA-256: bf7704042115058311276e91f581871491bc3524547d766b0e7085d334bb6686

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