Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f351dc2d4ec53ae…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 08:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 882fbc33d24daac4b9e661668b461dd7 SHA-1: 23584459c466a58981542505f4127b7f3426ace8 SHA-256: 4f351dc2d4ec53ae13494407bd137f7288be257c6cc234071d3df01309b1ece4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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/roblox-snowman-package-free-game-hack PDF link annotation
    • https://www.ak-oroslavje.hr/files/roblox-hacount-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/instaler-un-cheat-pour-roblox-phamtom-forces_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-lua-executor-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-spins-coin-master-blogspot_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_off00002f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6B 22556 bytes
SHA-256: ff294c929d4a67f6a71c66ac4e2f15fcac76b1ce11b3f913ebac1dbed8cbed8a
font_01_sfnt_off000061d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 19400 bytes
SHA-256: 880416c4bd2a438dd8465a08cea4688d588d3a9f3a7815c289a6072caa8442ed