Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56369e4b13fa43e…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 04:28:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ddbdef17104a59ec42da55d3d6187a43 SHA-1: fcab4420426c89e052ebe2a114358880cec1d847 SHA-256: c56369e4b13fa43e2c82eefda19232b9fc5d947faaa000c3ab19f5ef957e8664
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free Robux and game hacks, directing users to malicious redirector infrastructure. The embedded URLs, such as http://netcdn.co/app/431946152/real-free-robux-no-human-verification-game-hack, are flagged as malicious. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector pattern, likely intended to lead users to further malicious content or phishing pages.

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/real-free-robux-no-human-verification-game-hack In PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-how-to-hack-with-cookies_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/join-this-roblox-group-for-robux-free-london_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-roblox-games-without-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/can-you-download-minecraft-for-free_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_off00002ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF9 22144 bytes
SHA-256: a61ad8629181f89fbeee5b8a9e7a050c4cd14442b276e62bb687b887cb442b1d
font_01_sfnt_off00006016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6016 19408 bytes
SHA-256: 251d7e32d96edb5d285fe827ef13db064f1a9a28d8ec03d3b2e6225c935591a0

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