Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 55d3cf55d10adae7…

MALICIOUS

PDF / .VIR

121.9 KB Created: 2022-06-10 10:33:01 +02:00 Authoring application: giovand (via PDF Master 1.0.1) First seen: 2024-09-20
MD5: 912b2e6f450938828b7bcf3c065c71bf SHA-1: 6390b3df36a3ef09a233ab4eb6b99e7236de09ee SHA-256: 55d3cf55d10adae7beb5b602aa79958bfd435cbf373c660f729a6941b535c8e6
104 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0007

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/ZG93bmxvYWR8dTdiTkRWc2ZId3hOalUwTnpnd09UUXlmSHd5TlRrd2ZId29UU2tnVjI5eVpIQnlaWE56SUZ0WVRVeFNVRU1nVmpJZ1VFUkdYUQ/enamored.captains?TWl0Y2hlbGwgT24gRGVtYW5kIDIwMTUgUkVQQUNLIENyYWNrTWl=garish=pero=gault PDF link annotation
    • https://rocky-gorge-87539.herokuapp.com/olafoun.pdfIn PDF document text
    • http://ecolovy.net/wp-content/uploads/2022/06/RNS510_West_Europe_V10_torrent.pdfIn PDF document text
    • https://sleepy-ridge-49166.herokuapp.com/Astroburn_Pro_Serial_Key.pdfIn PDF document text
    • https://maquillajetonos.com/download-motic-images-plus-2-0-link/In PDF document text
    • https://logocraticacademy.org/adobe-photoshop-cc-19-1-2018-crack-hot-with-keygen-serial-key/In PDF document text
    • https://cosmonet.club/upload/files/2022/06/p7TEYdqYER4zJmJ31nXs_10_0e5cc53c722529971be24369fe87d0a5_file.pdfIn PDF document text
    • https://apolloinstitute.com.au/moodle/blog/index.php?entryid=1244In PDF document text
    • https://macroalgae.org/portal/checklists/checklist.php?clid=13593In PDF document text
    • https://blackbusinessdirectories.com/wp-content/uploads/2022/06/okm_visualizer_3d_crackrar.pdfIn PDF document text
    • https://liquidonetransfer.com.mx/?p=9074In PDF document text
    • http://evacdir.com/zg93bmxvywr8dtditkrwc2zid3hoaluwtnpnd09uuxlmshd5tlrrd2zid29uu2tnvji5evpiqnlawe56suz0wvrvefnvru1nvmpjz1vfukdyuq/enamored.captains?twl0y2hlbgwgt24grgvtyw5kidiwmtugukvqqunlienyywnrtwl=garish=pero=gaultIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00001ab4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1AB4 120140 bytes
SHA-256: a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4
font_01_sfnt_off0000c897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC897 76772 bytes
SHA-256: 07ce6fea3c98bf59133021be55ce9147f9c26365efe580a2a4f82130ca697f54