Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb9db8dc48555bb…

MALICIOUS

PDF

36.3 KB Created: 2020-06-03 07:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: bda060cc17953fcd9d5acd7224f74b8b SHA-1: ecb38e3c52bde1162f1f2fb322c3e40ec89e5fd2 SHA-256: dcb9db8dc48555bb2f6addf8711d4c4089454b0529574fc9229454e508f28ba5
96 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, identified as a 'PDF SEO Link Farm', suggesting a tactic to manipulate search engine results or redirect users to malicious content. The document body contains a URL that appears to be a lure for watching online content, likely a pretext to disguise the malicious link farm.

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://bellabunnyboutique.com/uploads/1/3/1/8/131858043/131858043.html#watch+house+md+free+online+season+3 PDF link annotation
    • http://skyvikingservices.com/uploads/1/3/0/2/130272945/bc2ebdb8e76.pdfIn PDF document text
    • http://hostmaster.amomentonthelips.co.uk/uploads/1/3/0/6/130604283/4f722f4.pdfIn PDF document text
    • http://mta-sts.mail.grovela.lt/uploads/1/3/1/3/131379946/ab983835b7.pdfIn PDF document text
    • http://brexitdiary.com/uploads/1/3/0/6/130620464/xitamepa-wagufakuviw-bipozilalegil-tuxatisub.pdfIn PDF document text
    • http://cloud9cooks.com/uploads/1/3/1/0/131070196/devixiloki.pdfIn PDF document text
    • http://sweetsavorysouthern.com/uploads/1/3/1/3/131380814/f9a6315cc.pdfIn PDF document text
    • http://food-shoppe.com/uploads/1/3/0/6/130605072/2474252e.pdfIn PDF document text
    • http://rvaleasing.com/uploads/1/3/0/7/130739062/1209260.pdfIn PDF document text
    • http://bellabunnyboutique.com/uploads/1/3/1/8/131858043/terms.htmlIn PDF document text
    • http://bellabunnyboutique.com/uploads/1/3/1/8/131858043/dmca.htmlIn PDF document text
    • http://bellabunnyboutique.com/uploads/1/3/1/8/131858043/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://meguzikifo.files.wordpress.com/2020/05/33007825643.pdfIn PDF document text
    • https://timowasufu57836677.files.wordpress.com/2020/05/54454627967.pdfIn PDF document text
    • https://nevosoxe.files.wordpress.com/2020/05/movagaziwamifuresadonij.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_off0000604c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 10996 bytes
SHA-256: afb1c8a8beba8462f159ba75601fc3ab10177715fd3bd5263663a0f5407a363d