Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e96e804470d5061…

MALICIOUS

PDF

39.1 KB Created: 2015-12-17 22:57:04 UTC Authoring application: Nitro Pro
MD5: 6405a0e22e95a9462dfb60d4b39e5d99 SHA-1: d17fd5fc9d17f475999e4692b291bc8aa947f37d SHA-256: 6e96e804470d5061b68ea6c408d95b78c646564dd67bafb245063c8b7e28fbf7
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file employs a common phishing tactic by presenting a screenshot as a lure, hiding clickable links within. These invisible links direct the user to download a malicious SCR file from volafile.io. The presence of multiple suspicious URLs and the critical heuristic firings indicate a clear intent to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8784

Heuristics 6

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • ClamAV: Pdf.Dropper.Agent-7270721-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7270721-0
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://volafile.io/get/2xxlPzoMOg9n/Confirmation_doc.scr
    • http://stevedalestudio.com/wp-content/plugins/
    • http://the-hamilton.co.za/wp-content/themes/
    • http://tigerfishfrenzy.com/error/adobe
    • http://tigerfishfrenzy.com/2aboutus_files/rae/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/

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