Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b0f4349e2872f8…

MALICIOUS

PDF

12.1 KB Created: 2015-07-16 09:13:41 +03:00 Authoring application: DOMPDF
MD5: 014993fab15203d0fbb8c205ad48fd35 SHA-1: 7cd22386f2c392337a394e19a257402c0a959a6b SHA-256: e9b0f4349e2872f8399131d11b6a9abbdb3631b5a1f6530bee336b05fbcff678
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to various domains, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. The ML classifier also flagged the document as malicious. No scripts were extracted, and the document body contains garbled text mixed with URLs, further supporting the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8959

Heuristics 2

  • 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.
  • 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://sinavlia.gr/index.php?article=2211.6&gseas=6&pdf=2211
    • http://icucc.hu/index.php?article=1906.2&bjqpf=2&pdf=1906
    • http://www.cmpartners.com.au/index.php?article=2202.1&vhbyw=1&pdf=2202
    • http://sinavlia.gr/index.php?article=1191.6&gseas=6&pdf=1191
    • http://www.cordill.net/index.php?article=476.2&jkghk=2&pdf=476
    • http://sinavlia.gr/index.php?article=425.6&gseas=6&pdf=425
    • http://almag-1.ru/index.php?article=1107.2&twdao=2&pdf=1107
    • http://caya-marina.de/index.php?article=1076.3&giqxz=3&pdf=1076
    • http://thomasandrew.com.au/index.php?article=79.1&ghhzd=1&pdf=79
    • http://sinavlia.gr/index.php?article=232.6&gseas=6&pdf=232
    • http://sinavlia.gr/index.php?article=38.6&gseas=6&pdf=38
    • http://sinavlia.gr/index.php?article=2137.6&gseas=6&pdf=2137
    • http://dmrranch.com/index.php?article=249.3&qasjf=3&pdf=249
    • http://sinavlia.gr/index.php?article=104.6&gseas=6&pdf=104
    • http://www.samanyolubilgisayar.com/index.php?article=1507.1&nsyhw=1&pdf=1507
    • http://sinavlia.gr/index.php?article=1424.6&gseas=6&pdf=1424
    • http://newcenturyedu.com/index.php?article=1566.5&ujnbv=5&pdf=1566

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