Malicious PDF — malware analysis report

Static analysis result for SHA-256 22de4e84b33abd0e…

MALICIOUS

PDF

35.9 KB Created: 2021-05-20 16:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c461dbacf7ebf8c1d8a45b60aebfa35 SHA-1: ef43429d8784e9210dbcbe2ccf5b1014821a377c SHA-256: 22de4e84b33abd0e2c482b302d3b5d2b6495323250d8ff5281bc78f19eee79ed
82 Risk Score

Malware Insights

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

The PDF document uses a brand impersonation lure (Facebook) to trick users into clicking a link for a "Free Minecraft Skins" generator. This link, `https://netcdn.xyz/app/479516143/free-minecraft-skins-pc-game-hack`, leads to a malicious download. The document body also contains multiple links to other suspicious PDF files hosted on `hiddencanyonbejiguwang.com`, suggesting a downloader or dropper functionality. No scripts were extracted, but the overall pattern indicates a phishing attempt designed to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.xyz/app/479516143/free-minecraft-skins-pc-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.xyz/app/479516143/free-minecraft-skins-pc-game-hack PDF link annotation
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-hack-someones-roblox-account_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_off0000354d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x354D 24544 bytes
SHA-256: ea87687c0de2edf22e4f27d3edf12dfa4fec6b7dbf756eb91bcc573dd4ed88e2
font_01_sfnt_off00006c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C76 17892 bytes
SHA-256: 38d2ac9589c51081060ff5b719ef2985d9213db1bca3ba0b1a36204662c24b5d

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