Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f80ee949f36abb…

MALICIOUS

PDF

36.8 KB Created: 2020-04-10 04:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fe1eaed1b887c891694b8f7024e1f99d SHA-1: b950397edea034e346dd4a316141dee21342d95b SHA-256: 12f80ee949f36abb643b521d5b42d1520869d5947dba04ac3ce0863a21c0bc2e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be the distribution of numerous external links, likely to host malicious content or for SEO manipulation.

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://rhinelandhomesconstruction.com/uploads/1/3/0/6/130621868/130621868.html#mercantilism+vs+laissez+faire+economics
    • http://oncereadthis.com/uploads/1/3/0/7/130776558/junefise_rekofusazuri_difunukameg.pdf
    • http://pandasalliance.org/uploads/1/3/1/1/131163859/muwuzuwoxitigotugiri.pdf
    • http://vickyscraftcreations.com/uploads/1/3/0/7/130775222/8269604.pdf
    • http://shopgraefuldreams.com/uploads/1/3/0/4/130476069/4008413.pdf
    • http://kaylaelouise.com/uploads/1/3/0/8/130874610/9001856583120f6.pdf
    • http://fireeducators.com/uploads/1/3/1/4/131407395/f6d0d.pdf
    • http://pistoncleaner.com/uploads/1/3/0/4/130488734/kesabixujezaji.pdf
    • http://dianekuntzdesign.com/uploads/1/3/0/4/130476043/xobevezolom.pdf
    • http://luiginyc.com/uploads/1/3/0/7/130775752/remufenujivuz-malozukuwizatow-mejajisozili.pdf
    • http://booksiwrite.com/uploads/1/3/1/4/131483772/eef5751ad2.pdf
    • http://monarchmagic.com/uploads/1/3/0/4/130435551/pafekolatopaz.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_off00006a3f.bin
d6467571f987f8dd00b5db5c72df0435cf445cd9778ed01a0edca2229a800225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3F 7120 bytes

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