Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cadcc2f9d9de3d5…

MALICIOUS

PDF

38.8 KB Created: 2020-05-17 00:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 501f4ddef2aa63a4976c76a5ccab7494 SHA-1: 358911d4ce8a5329d853dc72b0170c6cef90adfc SHA-256: 2cadcc2f9d9de3d53bd18e816ae81e8c3409192aea86a32e78366c3a775bf0b5
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body contains garbled text and some URLs, reinforcing the link farm nature. No scripts were extracted, and the primary malicious activity appears to be the distribution of these external links.

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://cloughmarine.com/uploads/1/3/0/8/130814479/130814479.html#3rd+person+zombie+games+android PDF link annotation
    • http://cheaposnow.com/uploads/1/3/1/4/131409909/fe0b97f63bfbdd.pdfIn PDF document text
    • http://stpeterslittlebray.com/uploads/1/3/0/7/130776626/jidaduxe.pdfIn PDF document text
    • http://yanayogis.com/uploads/1/3/0/7/130739983/2a93bd.pdfIn PDF document text
    • http://californiaregionalpatrol.com/uploads/1/3/0/8/130873830/jaxozimasezenu.pdfIn PDF document text
    • http://blissfullydead.com/uploads/1/3/1/1/131164272/wipedax_xetugixelepi_pejuselalaxu.pdfIn PDF document text
    • http://neuracing.com/uploads/1/3/0/9/130969080/fasenikolemi-xejikogu-perexujix-nivelu.pdfIn PDF document text
    • http://manxadvocacyproject.net/uploads/1/3/0/7/130739269/vapewelobakuba.pdfIn PDF document text
    • http://cat5wine.com/uploads/1/3/0/5/130588157/segadidowixosapadoju.pdfIn PDF document text
    • http://therring.com/uploads/1/3/0/6/130604944/aa82eb.pdfIn PDF document text
    • http://elevationmultisport.com/uploads/1/3/0/2/130271054/5350191.pdfIn PDF document text
    • http://hj888enterprisepteltd.net/uploads/1/3/0/4/130483616/3724132.pdfIn PDF document text
    • http://authenticmystory.com/uploads/1/3/0/4/130490117/4423728.pdfIn PDF document text
    • http://artsandcorks.com/uploads/1/3/1/6/131606694/4336751.pdfIn PDF document text
    • http://preciseweighingsystemsltd.com/uploads/1/3/0/3/130379367/8397659.pdfIn PDF document text
    • http://dgrealtygroup.org/uploads/1/3/1/4/131409616/nurotimiduxalar-jesen-pavirezumu-suvujexipikisu.pdfIn PDF document text
    • http://volareestheticsbykali.org/uploads/1/3/0/5/130539979/4401eea8b009e0.pdfIn PDF document text
    • http://refi-llc.net/uploads/1/3/1/4/131406354/nofadigifemujugulo.pdfIn PDF document text
    • http://opheimwealth.com/uploads/1/3/0/8/130813757/5053435.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_off00006c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 10240 bytes
SHA-256: 45d71265d60c0989568305a2087388f573773659dd63847473332f9fb3b03322

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