Malicious PDF — malware analysis report

Static analysis result for SHA-256 b523cc8b32265e44…

MALICIOUS

PDF

128.7 KB Created: 2022-06-11 12:19:34 +02:00 Authoring application: gabher (via PDF Master 1.0.1) First seen: 2022-07-15
MD5: bb1982e559666b7421d9d087f62f3b60 SHA-1: 7ef5427890f6a30a8d1e5766f4e36bf145fbabdf SHA-256: b523cc8b32265e443505e3519aaa1e4eff5d7f02d179e5607876680e2cbdf47b
104 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0097

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://evacdir.com/?search=hmrc&ZWxpdGUgcHJveHkgc3dpdGNoZXIgY3JhY2sgc2VyaWFsIGRvd25sb2FkZWx=chaise/ZG93bmxvYWR8UEoxYm5SaWEzeDhNVFkxTkRnNU16RTVNWHg4TWpVM05IeDhLRTBwSUhKbFlXUXRZbXh2WnlCYlJtRnpkQ0JIUlU1ZA/honcho/mashers PDF link annotation
    • http://evacdir.com/?search=hmrc&zwxpdgugchjvehkgc3dpdgnozxigy3jhy2sgc2vyawfsigrvd25sb2fkzwx=chaise/zg93bmxvywr8ueoxym5sawezedhnvfkxtkrnnu16rtvnwhg4twpvm05iedhlrtbwsuhkbflxuxrzbxh2wnlcyljtrnpkq0jiulu1za/honcho/mashersIn PDF document text
    • http://www.tcpdf.orgIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text

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_002_off000009d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9D5 120140 bytes
SHA-256: a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4
stream_009_off0001aaf9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1AAF9 119072 bytes
SHA-256: df221e87b81d1531cafdadb6c09a602e9f604d1baf0a17bbd350cbb83baa06f7
font_01_sfnt_off0000b7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B8 76772 bytes
SHA-256: 07ce6fea3c98bf59133021be55ce9147f9c26365efe580a2a4f82130ca697f54

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