Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc54f0cea8e0b3e3…

MALICIOUS

PDF

41.6 KB Created: 2020-05-22 15:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: a0b275bb230ad4c00af1ad9f4920462d SHA-1: 288d8caa7e2a2e260ce1a34091ad80bc5e86145c SHA-256: bc54f0cea8e0b3e3be391afa1eecd22e9aa38b74d8f23c4520c1dc866fa56924
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 User Execution

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution network. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to these external resources, which could host further malicious content or be part of an SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://popjetfountain.com/uploads/1/3/0/5/130588270/130588270.html#business+communication+essentials+7t PDF link annotation
    • http://ateliearteeproducoes.com/uploads/1/3/0/4/130436108/wowuzi.pdfIn PDF document text
    • http://2000fordranger.com/uploads/1/3/0/8/130814718/47a5bf107abd.pdfIn PDF document text
    • http://apexfiber.net/uploads/1/3/0/8/130874198/6817632.pdfIn PDF document text
    • http://sugarmamasconfections.com/uploads/1/3/0/8/130814562/pozuz_lizusamokuj.pdfIn PDF document text
    • http://thesecretlifeofsugar.com/uploads/1/3/0/7/130776602/9149654.pdfIn PDF document text
    • http://heirfi.com/uploads/1/3/0/8/130874470/2715922.pdfIn PDF document text
    • http://ojrservices.com/uploads/1/3/0/5/130545816/masigebijidireda.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 1

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_off000074f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 11488 bytes
SHA-256: 9b8ea25bc55ca0bc74f287f4f35450cec20ee4a20d0343bcec8edf0bdbf969bb

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