Malicious PDF — malware analysis report

Static analysis result for SHA-256 9876ff6f5791b0be…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 03:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d72e9deb3e74f305d3c8d53a067fb8ac SHA-1: 5659d1b84265231e89741da4c34edd2a4c636571 SHA-256: 9876ff6f5791b0befce8e4259f9de56b9c8d8eadd7491ffa51c2b09610d78cec
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 0.9980

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 http://netcdn.co/app/431946152/easy-hacking-engine-for-roblox-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-jailbreak-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-group-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-robux-hack-instant-proof-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-rig_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/cheat-engine-roblox-bypass-2021-june_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-unlimited-robux-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-branch-crown_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/spin-hack-flight-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-without-downloading-anything_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_off00002dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCE 22288 bytes
SHA-256: f1de19c6c9163c5c8c4260762f8aef7d2fd7575aa593942d8eb204c96ce6f3ab
font_01_sfnt_off00005f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 19120 bytes
SHA-256: 157c64b5cd86c3e28ba29ded2a8c327666af8843be78b8b29504e7a98e045b36

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