Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be4539df724b1a6…

MALICIOUS

PDF

36.5 KB Created: 2020-04-08 23:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e2691944d97bb79aec86d2595c5f6212 SHA-1: 894d71594cfec5993bbb79ae41e828ce59c30dea SHA-256: 6be4539df724b1a6508ee17f4a0cd23aa2aed323a34fbd190dd6bebdcc693250
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The primary goal appears to be directing users to a network of websites, likely for SEO manipulation or to host further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://waterlilypropertyservices.net/uploads/1/3/0/6/130620506/130620506.html#ps4+controller+sensitivity
    • http://406conventions.com/uploads/1/3/0/5/130588702/gafipusiliwe.pdf
    • http://kidperfectextreme.com/uploads/1/3/0/7/130776458/3eb121ea5b.pdf
    • http://thenorcliffefoundation.com/uploads/1/3/0/3/130313145/75002.pdf
    • http://ncabconsulting.com/uploads/1/3/0/2/130289474/10.pdf
    • http://usaequalizer.com/uploads/1/3/1/4/131453081/42a6d.pdf
    • http://illuminatious.com/uploads/1/3/0/7/130775219/1e9c7c21f2e.pdf
    • http://cambridgeasparagus.org/uploads/1/3/0/6/130639356/4903179.pdf
    • http://jpphillips.org/uploads/1/3/0/5/130551486/3825137.pdf
    • http://easyleadsdigital.com/uploads/1/3/0/5/130541904/muripukefanis.pdf
    • http://studyuniverse.net/uploads/1/3/0/4/130476359/ligezukimafabenib.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_off0000659c.bin
4895ef3bc632da319ef086c6fbe3af768b089474002814aa64ae43f70a045eaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 8204 bytes

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