Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37d909290442684…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 20:56:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3de21482a92cd734c64bffcb8e4f40b2 SHA-1: ce970c3071b965b81f524e2a3f05c6a2d1dc18a3 SHA-256: d37d90929044268454e4841582753f4a8344ac33931af77a04e49eb211f67f46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure for game-related cheats or currency, likely leading to a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious.

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-legit-robux-apps-game-hack In PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-generator-easy-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-gift-card-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/robux-page_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-tycoon-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hacks-for-design-it-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/rank-centers-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 22028 bytes
SHA-256: f68ffef7d850d8d7e7c74ad31f212473aee374a8c72aa7f5d2e4167a0d5a7055
font_01_sfnt_off00006070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 19116 bytes
SHA-256: 9aade3c095b5e8dfc28c423f925bd0e594c1552f2d1a41da44dae5d7f7c2cd66

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