Malicious PDF — malware analysis report

Static analysis result for SHA-256 761beaafa6f95197…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 09:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f2c43a2add8bac26cde301537af1798 SHA-1: ce2c006525f698ed97f192c1ab262831f0a53aec SHA-256: 761beaafa6f95197efb4b61fab70cb132b7c7e4e60b005f1427c84f6998abba6
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.tw/app/431946152/get-free-robux-2021-game-hack PDF link annotation
    • https://encounternepal.com/userfiles/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-account-cookie-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-a-roblox-account-no-bullshit_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hacker-roblox-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/alphalife-roblox-cheats_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_off00003143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 22208 bytes
SHA-256: a44b3a887b0e0e18397ec545a040432121c3fb1c3ad2431650c3e095fc1bc4a7
font_01_sfnt_off000062c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 19224 bytes
SHA-256: 821bcaeb5baca65cbb25255ca6205972482cf4d6c0082e9a42268983cc7c06a1

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