Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc05aa44d8a15a3…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 23:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 968059319103c8cad0e058c852a809b8 SHA-1: ba23fec3187e94a98377c0c764103d9e189b8664 SHA-256: 4fc05aa44d8a15a324da7a008590ff117a528f1709a1b412abad5514d2b033d3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a 'game hack' redirect lure, strongly suggesting a phishing or scam attempt. The document body text, though partially garbled, includes phrases related to 'free code card Roblox' and directs users to external sites like 'netcdn.co'. No scripts were extracted from this sample, but the primary attack vector appears to be social engineering via deceptive links within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-code-card-roblox-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pastebin-raw-roblox-change-name-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/real-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-jump-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-bloxburg-house-builders-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-potara-dragon-ball-rage-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-on-coin-master_GM406889139.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_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 22224 bytes
SHA-256: 9271f13719a5952481fa73c791b479b6abf88214b14e9f83237b52e309d41907
font_01_sfnt_off00005f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 18824 bytes
SHA-256: 9a6bd4daaf93bcc728989f4b928af5ff402ccc188c9935e25f83530a221d2183

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