Malicious PDF — malware analysis report

Static analysis result for SHA-256 1077fbee36e3310b…

MALICIOUS

PDF

41.4 KB Created: 2021-04-26 22:17:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f38e81e8dd2c960554eccd767de08f7 SHA-1: c5cd04f896ff2a15547332718daa5d1bb3914ad1 SHA-256: 1077fbee36e3310b49726094e3cd621be890010a7d1c17f495f6750ba6e1921f
82 Risk Score

Malware Insights

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

The document impersonates the Roblox brand and presents a "download generator" lure, which is a common tactic for credential phishing or malware distribution. The embedded URL `https://netcdn.xyz/app/431946152/roblox-content-deleted-pants-free-game-hack` is suspicious as it does not match the impersonated brand. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document's structure and embedded URLs suggest it's part of a phishing or malware delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/431946152/roblox-content-deleted-pants-free-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/431946152/roblox-content-deleted-pants-free-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/how-to-put-cheat-codes-roblox-bubblegum.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/cool-exploits-for-roblox-totaly-safe-and-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-comment-cheat.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-contact-roblox-for-hack-acount.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-stuff-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-more-robux-for-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-doge-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-free-robux-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-mad-city-hack-rank.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-millions-of-robux.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4329 26004 bytes
SHA-256: 74e64a042639cde56501586c1e4a1733a2e8b23f83158ec96157eabc5bdb62e4
font_01_sfnt_off00007e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E83 18776 bytes
SHA-256: 674844b0392e66875c45f278419578a505129fee674d4037b8367dccd069e5ac

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