Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9eba3c61394fda…

MALICIOUS

PDF

47.1 KB Created: 2020-03-11 02:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 638bc2fa0239c529c80f62f251a3c655 SHA-1: 8e0530ecf75c7cd8d568435ff43c5b9e983b8ac9 SHA-256: 7c9eba3c61394fda0d1a19927b616dc94974f6e0052437ad3d06cdca631d2c46
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique commonly used to redirect users to malicious websites or download further malware. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it was generated programmatically to host these links. The embedded URLs are the primary indicators of compromise.

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://dedicated-17.pleasingfood.com/uploads/1/3/0/8/130813146/130813146.html#1.5+agarose+gel+ethidium+bromide PDF link annotation
    • http://vaservicesllc.com/uploads/1/3/0/3/130379239/rovumiferinilusen.pdfIn PDF document text
    • http://soundpole.net/uploads/1/3/0/6/130604175/minukixo.pdfIn PDF document text
    • http://fistonich.com/uploads/1/3/0/3/130313114/fusafigeze.pdfIn PDF document text
    • http://yellowgroup2.com/uploads/1/3/0/7/130775968/9067284.pdfIn PDF document text
    • http://www.zakinvestments.co/uploads/1/3/0/6/130620568/f2ba59a2.pdfIn PDF document text
    • http://hostmaster.maxscoffeeshop.co.uk/uploads/1/3/0/5/130544110/duxinuwaduw.pdfIn PDF document text
    • http://nutritiongirl.org/uploads/1/3/0/2/130287463/xomivipi.pdfIn PDF document text
    • http://partybikebusiness.com/uploads/1/3/0/5/130590278/11f58a.pdfIn PDF document text
    • http://melisainc.com/uploads/1/3/0/4/130483820/1497001.pdfIn PDF document text
    • http://nurseventurers.com/uploads/1/3/0/4/130489776/4277746.pdfIn PDF document text
    • http://legacyparenting.today/uploads/1/3/0/4/130477234/mamilu_larap_ziwikuf_marapebepuga.pdfIn PDF document text
    • http://mta-sts.mic18.hk/uploads/1/3/0/6/130639750/6070091.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 2

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_off00008e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E49 8820 bytes
SHA-256: ad68f947a2c733edf5df1cd916154e761e2c524b1bb6a05a0a466b43760b2c9a

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