Malicious PDF — malware analysis report

Static analysis result for SHA-256 07305abfffef615e…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 07:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c0649de1abe42b93004fcd921064a5ad SHA-1: ca78db861cdd0a352a0a75202d68ed0c3a404460 SHA-256: 07305abfffef615e68fcf71038776951a8e3ca6ac812494e6a1bde56e490f099
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains a lure impersonating Facebook, directing users to a link that promises game hacking tools. This is a common tactic for credential phishing or distributing malware. The embedded URL and the nature of the lure strongly suggest a malicious intent to exploit user interest in free game items or hacks. No scripts were extracted, but the ML classifier and heuristic firings indicate a high likelihood of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-to-hack-critical-strike-roblox-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/how-to-hack-critical-strike-roblox-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tiktok-free-likercom_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-robux-com_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
stream_004_off000050c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C3 24612 bytes
SHA-256: b203535529fa9309246bd32b0495489dcc8d39d1e7afa3b7ce88e930320e6953
font_01_sfnt_off0000898d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898D 18568 bytes
SHA-256: a2c8c4475298a0de67dcb4d505fd32626c585268f2bfb3705a09b7de1f2b45c2

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