Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fa8e3df7a6fea6…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 01:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e731b7c583ba02783e9c4f577499b01d SHA-1: 10e831119aa7169d717191c5ffe0ecb5d1656ac1 SHA-256: 78fa8e3df7a6fea633a3c3a1b583daaadbb4085972104aef7df9714043d9dd1b
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 0.9865

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 https://netcdn.online/app/479516143/minecraft-client-download-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id//repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://www.youtIn 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_off00004edc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EDC 24540 bytes
SHA-256: a1bae6537d87eb247db606c5680c9290fb73a0f117c93e4d3721ef8ae9a42368
font_01_sfnt_off00008716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 18292 bytes
SHA-256: df528b26126d4fc11b7eeaa3b1f911f76ffca14ff52ae065bc56290066d0d251

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