Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdab4e3f888dcb0…

MALICIOUS

PDF

32.3 KB Created: 2020-05-16 19:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: b227b2cc61f1e03341a0643445639dcc SHA-1: 700a3c5b810aa6628ed2dc2aad833c4dd89c52af SHA-256: fbdab4e3f888dcb03e175da18cf9d5d77bc835c876f9eb802f85fa2d37b7a3b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to affidavit formats and includes many of these external URLs. This suggests a tactic to manipulate search engine results or to distribute malicious content through a link farm. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://bearcreekpediatricclinic.com/uploads/1/3/0/6/130605384/130605384.html#pmgdisha+affidavit+format+pdf PDF link annotation
    • http://sylvainetlesfilles.com/uploads/1/3/1/3/131398066/kinaginojagike.pdfIn PDF document text
    • http://natalieunisexandbarbershop.com/uploads/1/3/1/4/131407655/pebaniw.pdfIn PDF document text
    • http://mymemories.life/uploads/1/3/1/1/131163660/senamajorenone_rozupiz_doput_zinibaleridoz.pdfIn PDF document text
    • http://opjrecords.com/uploads/1/3/1/4/131453031/ziloxotitig.pdfIn PDF document text
    • http://smeacademy.se/uploads/1/3/0/8/130814286/kagasopejigogot.pdfIn PDF document text
    • http://houzzphotog.com/uploads/1/3/1/4/131455543/e162a.pdfIn PDF document text
    • http://dnbtradings.com/uploads/1/3/1/1/131164431/0e98a.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_off000055cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55CF 9504 bytes
SHA-256: 241ab2191d9322cf226ec81d0cbf6146f9fd86e01df4bad17558c9c4ef8d3445

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