Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2585da95d75bfe…

MALICIOUS

PDF

42.2 KB Created: 2020-04-05 15:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0987f3e1a2ca598ef52fd5b6c373206e SHA-1: 6e82ea391fb985ed631d545d86a45c5a1a5ba856 SHA-256: 2d2585da95d75bfe09d3a8f6cb9b2cea750bd12b110093799ac117b5a110f51b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF document exhibits characteristics of a link farm, with numerous external URLs pointing to other PDF files. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains a lure related to 'Apple supply chain management' and references the wkhtmltopdf tool, suggesting it was generated programmatically. The primary attack pattern involves directing users to a large number of external resources, likely for SEO poisoning or to host further malicious content.

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://carolinafinngard.es/uploads/1/3/1/0/131070826/131070826.html#apple+supply+chain+management+ppt
    • http://aguaibiza.com/uploads/1/3/0/4/130477448/22f6479a1eaf8f.pdf
    • http://thechefdoctor.net/uploads/1/3/0/7/130739023/3072388.pdf
    • http://creamcitycollaborative.net/uploads/1/3/0/6/130639452/35fa741fe7.pdf
    • http://nationwidehealthgroup.com/uploads/1/3/1/3/131383959/9155117.pdf
    • http://markkubrask.com/uploads/1/3/1/0/131070842/zarenode.pdf
    • http://brewya.com/uploads/1/3/0/4/130489361/6815e89160b5639.pdf
    • http://slatteneyecare.com/uploads/1/3/0/6/130620644/rilonito.pdf
    • http://tabeladesigns.com/uploads/1/3/0/8/130874613/40e52205d1.pdf
    • http://anastasiasjewelry.com/uploads/1/3/0/4/130435881/ad19ed19ffeb.pdf
    • http://joinunique.com/uploads/1/3/0/6/130621758/mizos.pdf
    • http://cazadorclub.com/uploads/1/3/0/6/130621509/8198049.pdf
    • http://jaymichaelgilman.com/uploads/1/3/0/7/130740349/5229919.pdf
    • http://thewisdomofshe.com/uploads/1/3/0/5/130588529/jososabizo-popovev-dawatalebepuwav-potajajokides.pdf
    • http://yahmee.net/uploads/1/3/0/9/130969332/likirozefu.pdf
    • http://andersonfitnesssurrey.com/uploads/1/3/0/2/130270748/peguwozejukaf.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_off0000775a.bin
2fcd7cee4e10d99ea131a54984f0930f5f30b6a5ad4b3e6413d235a2dd60f5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 9120 bytes

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