Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae75a50e0c73c0ca…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 00:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e7a0894d26a7eeca8e7011342cff45c9 SHA-1: aac7f5ca898ff01700a03719a5ed5efacfe96b8c SHA-256: ae75a50e0c73c0ca123fd72d818799bd3e0502ae15b686b95c122cfd0687066f
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 0.9865

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-free-robux-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-unlimited-robux-and-tickets_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://collectrobux.coIn 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
stream_004_off00004fd4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD4 25632 bytes
SHA-256: 586878119abed5c6790271765d5b65d61a10f192526ac381f736fb6cf5c6dc77
font_01_sfnt_off00008b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 18088 bytes
SHA-256: 03c92d59c548fbfdae08874221752d30f8caaed88781636bf7d18542e7c5fe52

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