Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a60229316293a95…

MALICIOUS

PDF

42.9 KB Created: 2020-03-21 02:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f8ca4a241ca6b2adc7b27aee0dc84f3f SHA-1: fab9ef5068773571433425e4c2481209ea8b14ec SHA-256: 0a60229316293a95f4f3e4e9ea697d14022d83e439d59b49e14bd7c03138f303
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also strongly indicated maliciousness. These links likely serve to direct users to malicious websites or for SEO spamming purposes. No scripts were extracted, and the document body was heavily obfuscated.

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://freedomtrailersinc.com/uploads/1/3/0/9/130969726/130969726.html#que+es+coeficiente+de+extincion+molar
    • http://host179.carmichaelnl.com/uploads/1/3/0/7/130776309/donojatapojewa.pdf
    • http://bisconsulting.it/uploads/1/3/0/8/130815093/109891.pdf
    • http://femmehausboutique.com/uploads/1/3/0/6/130639567/juledeba_dubosim_tuwadidajusuv.pdf
    • http://www.kiddywinkskindy.org/uploads/1/3/0/2/130270994/0e556d1.pdf
    • http://movimientomexicano2018.org/uploads/1/3/0/8/130873795/1906274.pdf
    • http://www.australianchartsreport.com/uploads/1/3/0/7/130738566/e670bede7da.pdf
    • http://communication4us.com/uploads/1/3/0/5/130547527/1076173.pdf
    • http://rosebudtel.info/uploads/1/3/0/8/130874084/lifomigizoja-badepulelipo.pdf
    • http://www.dianedurbin.com/uploads/1/3/0/7/130776096/nuvapogifi.pdf
    • http://headwaterscorp.us/uploads/1/3/0/8/130813738/6273070.pdf
    • http://mobilenotaryinca.com/uploads/1/3/0/6/130620356/3470029.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd6.bin
6b1bd95151786a1da02687046b1bfafc3a97f7a776f4b2d7afd04b299159b027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD6 9420 bytes
font_01_sfnt_off0000920a.bin
4074a8e915ca6c34e58b8321419a404e2bad8e1cf4956615086d131bc693443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 3004 bytes

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