Malicious PDF — malware analysis report

Static analysis result for SHA-256 2738974588cc3754…

MALICIOUS

PDF

34.6 KB Created: 2020-04-11 08:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 06601038ac86726ba92ec62b67ecd888 SHA-1: d5191119d3639ba19a0e6fcbd79f88746b7ad0ca SHA-256: 2738974588cc3754e63f5f3f7cd898d7d5ef22af6ef57603caea908a2ad8b596
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO poisoning and directing users to malicious sites. The ML classifier strongly indicated maliciousness. The document body text, though garbled, contains a URL that mirrors one of the extracted links, suggesting an attempt to lure the user into clicking it. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://hotelvic-phase2-ko.devsite-1.com/uploads/1/3/0/4/130483736/130483736.html#the+odyssey+translated+by+emily+wilson+free+pdf PDF link annotation
    • http://concordfbc.org/uploads/1/3/0/6/130622089/c7bd2e7.pdfIn PDF document text
    • http://tmlogisticsmx.com/uploads/1/3/0/4/130436141/rimunibomi.pdfIn PDF document text
    • http://daytoncarpetcleaning.com/uploads/1/3/0/6/130639305/gatarewuliwiwabob.pdfIn PDF document text
    • http://riversendseo.com/uploads/1/3/1/3/131380021/aa881dca.pdfIn PDF document text
    • http://pleasekira2d.com/uploads/1/3/1/0/131070469/3477e5af.pdfIn PDF document text
    • http://friendsofieps.com/uploads/1/3/0/5/130547069/dawuxibinil-daxotojo-vijudarinuwo.pdfIn PDF document text
    • http://villagearch.com/uploads/1/3/1/6/131606405/8999092.pdfIn PDF document text
    • http://momuniversity.org/uploads/1/3/0/3/130312996/9007702.pdfIn PDF document text
    • http://meridianvalues.com/uploads/1/3/0/4/130435503/wofasopip_zofunavurulo.pdfIn PDF document text
    • http://fionaspotswood.uk/uploads/1/3/0/5/130588653/7e9b97297589.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000616b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 7572 bytes
SHA-256: bc23745d894e475eb552c96dc080a9888f05dfe1ea060ddf6ee8071fec4df0f4

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