Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f609249b293c8ec…

MALICIOUS

PDF

40.4 KB Created: 2020-06-08 10:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 72236dfdce424d3cb05c4e4de59aeb03 SHA-1: f090636c7be9754f7c9caaca69c277b4fb4a4a4a SHA-256: 9f609249b293c8ec718cffa9e2a888412e35a3d73be33715f8c03b46ccd0d1b5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The primary URL http://kindredknots.shop/uploads/1/3/1/3/131383770/131383770.html#g%25E1%25BA%25B7p+m%25E1%25BA%25B9+trong+m%25C6%25A1+sheet+nh%25E1%25BA%25A1c is particularly notable. The document body is heavily garbled, suggesting it may have been generated programmatically or is a result of obfuscation.

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://kindredknots.shop/uploads/1/3/1/3/131383770/131383770.html#g%25E1%25BA%25B7p+m%25E1%25BA%25B9+trong+m%25C6%25A1+sheet+nh%25E1%25BA%25A1c PDF link annotation
    • http://southeastsugar.com/uploads/1/3/1/3/131382486/rizipivuruzabezojubu.pdfIn PDF document text
    • http://djorlando.net/uploads/1/3/0/4/130488357/koliv.pdfIn PDF document text
    • http://a2bhasslefree.com/uploads/1/3/1/4/131407802/kizuderaronujabogit.pdfIn PDF document text
    • http://autodiscover.hanskombucha.com/uploads/1/3/0/2/130287977/2762637.pdfIn PDF document text
    • http://courtgrabber.com/uploads/1/3/1/8/131858043/408251.pdfIn PDF document text
    • http://propellerlife.ca/uploads/1/3/0/8/130813834/15505002a.pdfIn PDF document text
    • http://myetinfo.com/uploads/1/3/0/7/130739026/1625169.pdfIn PDF document text
    • http://premier1edu.com/uploads/1/3/1/3/131383388/6773791.pdfIn PDF document text
    • http://74-123-77-31.mgwnet.com/uploads/1/3/0/6/130604465/rikidulemozajabu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://peropifi.files.wordpress.com/2020/06/67727415142.pdfIn PDF document text
    • https://taginapure.files.wordpress.com/2020/06/34471296140.pdfIn PDF document text
    • https://dogusiguxit641222465.files.wordpress.com/2020/06/4272917749.pdfIn PDF document text
    • https://jesebenoj.files.wordpress.com/2020/06/44494946467.pdfIn PDF document text
    • https://jetawuboke.files.wordpress.com/2020/06/jipapuguvofajunedivis.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

Related samples 6

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_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 23632 bytes
SHA-256: caa0935c7f61304ea4f3fff167a62609c3eb8727cf498964660634b21cd4f054

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