Malicious PDF — malware analysis report

Static analysis result for SHA-256 77feaff725273e75…

MALICIOUS

PDF

55.4 KB Created: 2022-12-03 13:23:00 +00:00 Authoring application: halois (via mPDF 8.1.2) First seen: 2026-06-05
MD5: 98d9c41cf8338d981ed716df6c2111f3 SHA-1: 738e4d89d05e0c0588245f18f81701d5bc968900 SHA-256: 77feaff725273e7503b733e8013240474020007b8932aa307c54e9d6579c4fda
104 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0003

Heuristics 4

  • Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
    PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
  • PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
    PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
  • 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://widesearchengine.com/S25vd2xlZGdlIE5vdGVCb29rS25.swum/bubbly.occasionaly?snoozefest=spop&ZG93bmxvYWR8OTRETTI5aGJYeDhNVFkzTURBMk5UWTFOSHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA=submits PDF link annotation
    • http://widesearchengine.com/s25vd2xlzgdlie5vdgvcb29rs25.swum/bubbly.occasionaly?snoozefest=spop&zg93bmxvywr8otretti5agjyedhnvfkzturbmk5uwtfoshg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda=submitsIn PDF document text
    • http://dejavu.sourceforge.netIn extracted file (stream_004_off00002d19.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_004_off00002d19.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00002d19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D19 25116 bytes
SHA-256: b76d81f1f3746b5db7ba9bb6510785d86a12f3cf7f08a0b42d46ea8df60e2b61
stream_008_off00009d57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9D57 119072 bytes
SHA-256: df221e87b81d1531cafdadb6c09a602e9f604d1baf0a17bbd350cbb83baa06f7
font_01_sfnt_off00006de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE2 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8

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