Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08a1ceaf35533a0…

MALICIOUS

PDF

31.8 KB Created: 2020-05-18 05:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca14c50afad1d55dacd0fd0c7a4f5fe SHA-1: 9f156536b717fd41e600ac2c092c344c0b316afc SHA-256: e08a1ceaf35533a0f6708536c40326e61377d70eafcdbfd73be4d49c44f4064d
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://beingself-centered.com/uploads/1/3/0/7/130739480/130739480.html#diamante+poetry+template
    • http://encinitas-ranch.com/uploads/1/3/0/8/130813651/1898722.pdf
    • http://yourridehomeohio.com/uploads/1/3/1/0/131071041/64490f.pdf
    • http://bahaisunited.org/uploads/1/3/0/5/130588230/vowan-rinizodadumuwi-rofolalepol.pdf
    • http://beechfieldestate.com/uploads/1/3/1/4/131409508/f9c26051a3cab9b.pdf
    • http://wistem.org/uploads/1/3/1/6/131606281/susevonudolibogeveg.pdf
    • http://adriengossiome.com/uploads/1/3/0/9/130969723/tevatoke.pdf
    • http://divorcenotwar.com/uploads/1/3/1/0/131070357/suzemiwo.pdf
    • http://luxecosmeticsllc.com/uploads/1/3/0/8/130874122/savuwagirom-gelozevizifuj-gikad-kemezipan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051e5.bin
f26476ece6441294a133cc19580f0c242e406f32aa1ca0b2a02182692a9bbda2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E5 10124 bytes

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