Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ea04113055238f…

MALICIOUS

PDF

34.5 KB Created: 2020-04-11 03:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e903170e74ffa8d390b1f6dad24421c8 SHA-1: f96700e6d2a382d2efe1384125dad172e7241add SHA-256: 45ea04113055238faaf3cd48587d349f1e81de679ccfb21e97ca235b133e3551
96 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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to URLs, suggesting a lure to external content. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious websites.

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://foothillsbiblefellowship.com/uploads/1/3/0/7/130775017/130775017.html#present+value+table+pdf
    • http://rickybobbysbackyardroosterpiss.com/uploads/1/3/0/6/130604446/kanit-bobafixaxotoxe-zawabo.pdf
    • http://doompatrolmakeup.com/uploads/1/3/0/9/130969456/27d174cac47c8c.pdf
    • http://reaganandfriends.com/uploads/1/3/1/4/131438420/bawufukesuzatum.pdf
    • http://insideoutattorney.com/uploads/1/3/0/6/130639165/vokuzamadomusujid.pdf
    • http://localasbestosremovals.co.uk/uploads/1/3/0/6/130620501/6612013.pdf
    • http://petersconstructionma.com/uploads/1/3/0/8/130874076/a87426585fe.pdf
    • http://lecrin-valley.eu/uploads/1/3/0/7/130739836/9942c.pdf
    • http://nomaticbeats.com/uploads/1/3/1/3/131380988/3bd8820b3dca9.pdf
    • http://iwill-nyc.org/uploads/1/3/0/6/130621393/5395743.pdf
    • http://themarriagecenter.us/uploads/1/3/0/8/130873790/zarimolu_govujuju_siratoxexolifug_torewuvujesu.pdf
    • http://eastbostonmuseum.com/uploads/1/3/0/7/130775848/9092731.pdf
    • http://insideoutattorney.com/uploads/1/3/0/
    • 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_off000061f1.bin
77ad3486244a26d4aca5bd4c47a3c34d6d26b3ca696d2799d89cbe3c9bc5dec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F1 7212 bytes

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