Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e929e5254ee733…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 12:13:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9ffcdf2adb7213f66f6d867bb38d3cb3 SHA-1: d988d1bdaea85a68401c4046a4a2bf20ce3da89f SHA-256: 41e929e5254ee733f1ad6ebd4b7703d3731fa669c98b265f0ed8b4d40e168bb4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.online/app/431946152/roblox-hacked-version-download-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-cheat-engine-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/pubg-uc-rate-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-500-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/codes-how-to-get-free-robux_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_off0000533a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x533A 25020 bytes
SHA-256: 4286255955bcdd447630d45327b0035482e44223b93bbeecb7674dff12b64aa2
font_01_sfnt_off00008c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C56 18940 bytes
SHA-256: 045b97c0477fa0a77fe25df190f3dc8d91b636a592878cab4dc6788bf6280dbe

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