Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea0a1d9407e5f54…

MALICIOUS

PDF

50.3 KB Created: 2020-06-05 06:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 7ddb1bcc3b585494baf4266b0ac70303 SHA-1: de7b3db4356bb954e0f2a242953037e951340e78 SHA-256: bea0a1d9407e5f5424ec8a0cdb07a10d64231676db60cbb996890ec905a4830a
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. This indicates the document's primary purpose is to redirect users to a large number of external websites, likely for malicious SEO or to distribute further payloads. The document body contains garbled text and a reference to 'Ofiyolitik seri nedir', suggesting a lure or obfuscation tactic. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://hostmaster.4140designs.com/uploads/1/3/0/4/130477193/130477193.html#ofiyolitik+seri+nedir PDF link annotation
    • http://bodiedbydestiny.com/uploads/1/3/1/4/131483598/wijegep-livivorisikos-fafupuravije.pdfIn PDF document text
    • http://goatbree.com/uploads/1/3/0/4/130488123/tozif.pdfIn PDF document text
    • http://15j.undesirable.us/uploads/1/3/0/7/130739544/dddfd.pdfIn PDF document text
    • http://hostmaster.4140designs.com/uploads/1/3/0/4/130477193/terms.htmlIn PDF document text
    • http://hostmaster.4140designs.com/uploads/1/3/0/4/130477193/dmca.htmlIn PDF document text
    • http://hostmaster.4140designs.com/uploads/1/3/0/4/130477193/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://popixunumofi.files.wordpress.com/2020/06/musutodogo.pdfIn PDF document text
    • https://didebonuruta.files.wordpress.com/2020/06/xemanaxizulemu.pdfIn PDF document text
    • https://lipurenipagu.files.wordpress.com/2020/06/15845681355.pdfIn PDF document text
    • https://zedovase.files.wordpress.com/2020/06/69492026696.pdfIn PDF document text
    • https://vavuxodebipu391067836.files.wordpress.com/2020/06/75345563287.pdfIn PDF document text
    • https://tafirero816526547.files.wordpress.com/2020/06/vufixunuf.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9601 12736 bytes
SHA-256: a389a483ac8ae6ea8121219f98302c5f5e95fd9f3463697a99920cda161bd428