Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd69c6868c83caa…

MALICIOUS

PDF

11.3 KB Created: 2015-07-14 19:48:24 +03:00 Authoring application: DOMPDF
MD5: b74c3f05f3788b63d053fdddee627ab9 SHA-1: fc07dd722932ba52e6565770e27676c73c445a94 SHA-256: 5bd69c6868c83caa8997cbce8c46ff97d86dba974bb414442c765255d53472a2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to various websites, identified by the PDF_SEO_LINK_FARM heuristic. This suggests a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier also flagged the document as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9383

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://www.cmpartners.com.au/index.php?article=1747.1&vhbyw=1&pdf=1747
    • http://b-attitude.net/index.php?article=1537.6&zpxbh=6&pdf=1537
    • http://360mediagrouponline.com/index.php?article=1359.7&pseww=7&pdf=1359
    • http://www.cmpartners.com.au/index.php?article=1174.1&vhbyw=1&pdf=1174
    • http://capb.fr/index.php?article=2419.1&gcwnz=1&pdf=2419
    • http://www.cmpartners.com.au/index.php?article=848.1&vhbyw=1&pdf=848
    • http://www.newskills.com.my/index.php?article=1463.2&cclju=2&pdf=1463
    • http://sinavlia.gr/index.php?article=237.5&cypki=5&pdf=237
    • http://www.enakcami.com/index.php?article=549.3&thoit=3&pdf=549
    • http://www.cmpartners.com.au/index.php?article=65.1&vhbyw=1&pdf=65
    • http://www.cmpartners.com.au/index.php?article=1202.1&vhbyw=1&pdf=1202
    • http://www.cmpartners.com.au/index.php?article=308.1&vhbyw=1&pdf=308
    • http://unifiedmagik.com/index.php?article=1076.1&dlnya=1&pdf=1076
    • http://www.cmpartners.com.au/index.php?article=2498.1&vhbyw=1&pdf=2498
    • http://www.crowdy.com.au/index.php?article=1105.3&cjrfn=3&pdf=1105
    • http://www.cmpartners.com.au/index.php?article=451.1&vhbyw=1&pdf=451
    • http://c-retro.com/index.php?article=514.5&epuyx=5&pdf=514

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