Malicious PDF — malware analysis report

Static analysis result for SHA-256 912eac3d946545e0…

MALICIOUS

PDF

46.8 KB Created: 2021-06-04 00:28:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e75871e1d17fd8e4beabaad9a81f0ebf SHA-1: d7cbea5afbb5b9c75741bda61125b349c8a1ad12 SHA-256: 912eac3d946545e088d0f048ecbc4d29cf8505a0e0e1552ee4c8982e0cfb8459
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains embedded links and a call-to-action button, impersonating Facebook to lure users with a 'Free Robux' offer. The primary malicious link directs to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of multiple malicious URLs and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/free-robux-no-password-game-hack.
  • 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/free-robux-no-password-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fa0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA0 24900 bytes
SHA-256: cc8e4cb91b7879375434b327ee73ed1b2e87d616571fa2506fa0eeebeb2587ae
font_01_sfnt_off00008867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 3016 bytes
SHA-256: 72cc61a5f772044d01fdbb3c70bc39cb08a658e6c507160146fc60c31cd3e987
font_02_sfnt_off000092cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CD 18732 bytes
SHA-256: b254955316d184f98c6f6070526605807868e3146c8b9e5f8ca39f20861b2296

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