Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a89466cf146563a…

MALICIOUS

PDF

44.1 KB Created: 2020-04-17 11:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 082d63ce0c3e56bf0a81a6b6aae3fce1 SHA-1: e6e2dd6ebca3ce2dce64b093dbf96b45c4d60111 SHA-256: 4a89466cf146563a4ac57345f06d6b278c63b3bf69888a2f307066a244ec12df
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a significant number of external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a link farm strategy. The primary intent appears to be to lure users to click on these links, which predominantly point to domains associated with hosting PDF files, suggesting a distribution or redirection mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ewaveinc.com/uploads/1/3/0/2/130274315/130274315.html#guidelines+vertebral+artery+dissection
    • http://polaricebathdelights.com/uploads/1/3/0/8/130874002/4404938.pdf
    • http://hanserdventures.com/uploads/1/3/0/2/130271206/9573a10dc938.pdf
    • http://glassworksproject.com/uploads/1/3/1/4/131407498/xepul_nezabutovi_nowepowodinaxi.pdf
    • http://lawn-care-services.ca/uploads/1/3/0/2/130271011/kituzodur.pdf
    • http://team-revo.com/uploads/1/3/0/5/130543065/6188435.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007104.bin
596f9df3c1f1a1f90f4ef37b5a27eee71423a351da1cc811f6232751e789a552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 7928 bytes
font_01_sfnt_off00008fc0.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC0 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.