Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50907c969708f08…

MALICIOUS

PDF

93.7 KB Created: 2020-06-15 16:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6a04efb14988a7aa68a5b2f03f5f8e7 SHA-1: eaea13c601f6630c156cb2ae17da6336fb6b0ad7 SHA-256: c50907c969708f08177f24a0949e070c4ca263e75f371e6827b9a0ba43e6dbe0
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though obfuscated, contains a URL that appears to be part of this link farm. The primary attack pattern involves luring users to a website via a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mortarframellc.net/uploads/1/3/0/2/130291676/130291676.html#guide+to+us+politics
    • http://mta-sts.aleksandramysiak.pl/uploads/1/3/0/2/130271171/xidukusalonim.pdf
    • http://solematesshoesaccessories.com/uploads/1/3/0/2/130271097/4606336.pdf
    • http://avemclan.com/uploads/1/3/0/6/130640110/168170cc1e55896.pdf
    • http://nofone.net/uploads/1/3/1/6/131606331/6759693.pdf
    • http://help-hope-geo.net/uploads/1/3/0/6/130604562/48163.pdf
    • http://sabinescottage.com/uploads/1/3/0/5/130539205/8dd1a256db5d.pdf
    • http://servicetocivilian.ua.edu/uploads/1/3/1/6/131606546/rabipasa-berevapokesa-womanifuwav.pdf
    • https://daborexawuv.files.wordpress.com/2020/06/tanimiv.pdf
    • https://baxejubox.files.wordpress.com/2020/06/vomitunozojam.pdf
    • https://mezaniv.files.wordpress.com/2020/06/80751648034.pdf
    • https://remumalu.files.wordpress.com/2020/06/gikefo.pdf
    • https://pajuxegob.files.wordpress.com/2020/06/jasutilesotadopazije.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_off000145e5.bin
3226e480945e0c35cc4ac6cf8b67f0434c9c3fa1d125d97fbf22d982a1e4a2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145E5 11128 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.