Malicious PDF — malware analysis report

Static analysis result for SHA-256 30882797c4404f21…

MALICIOUS

PDF

33.1 KB Created: 2020-05-17 05:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 547186c9f49dfe3197bf914c257362b3 SHA-1: 465f8cfab3f242a47703d0511787a47c895eb566 SHA-256: 30882797c4404f21f34ecabda927da8778242f10b20a11e6dc0af862968d74db
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files on various domains. This behavior is indicative of a link farm or a method to distribute malicious content. The presence of multiple external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest this malicious intent. No scripts were extracted from this sample, limiting further analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://prettypextensions.net/uploads/1/3/0/5/130545475/130545475.html#binary+form+definition+english PDF link annotation
    • http://hairbynicolewasserman.com/uploads/1/3/0/4/130477566/1123605.pdfIn PDF document text
    • http://sultanalthani.com/uploads/1/3/0/7/130739405/3518460.pdfIn PDF document text
    • http://helpingsolutions.net/uploads/1/3/0/5/130539697/e786430576c6.pdfIn PDF document text
    • http://globalsupplyandtrading.com/uploads/1/3/0/7/130739060/zuzodinosipabokewavo.pdfIn PDF document text
    • http://unavoceensemble.com/uploads/1/3/1/4/131409861/wiwawimomidori_newogi_zosobigoju.pdfIn PDF document text
    • http://scottplasticsltd.com/uploads/1/3/0/5/130539053/megirok.pdfIn PDF document text
    • http://whatthechucktoday.com/uploads/1/3/0/6/130604689/ca3873a7b26.pdfIn PDF document text
    • http://executivepetresort.com/uploads/1/3/0/7/130776607/3196993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

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_off000057e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E4 9872 bytes
SHA-256: fb73cea329ecb10d117dba5e6e292a15635955a724a739d1b3f250dcc1aea6f5

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