Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0eee15d352c7d7…

MALICIOUS

PDF

26.4 KB Created: 2020-05-20 15:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 7841aa3efc2f1fb81015fcb0295fe657 SHA-1: caa35f8710254d92f62559fa611ebac25dd51377 SHA-256: dc0eee15d352c7d7d3df3fae50d712445b4c112875944d5b3f42d8f27ba73bf6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a high likelihood that these links lead to malicious or deceptive content. The document body contains garbled text and a reference to 'Kobalt miter saw parts', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the sheer volume of external links points towards a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://justraze.com/uploads/1/3/1/4/131452808/131452808.html#kobalt+miter+saw+parts PDF link annotation
    • http://coirnect.com/uploads/1/3/0/7/130775391/boleku-xawerubune-buzalarisifipim-rebunezux.pdfIn PDF document text
    • http://socalmrm.com/uploads/1/3/0/7/130739712/losedubiremisonebom.pdfIn PDF document text
    • http://graceangracerentals.com/uploads/1/3/0/7/130740017/xosenafosugajojafas.pdfIn PDF document text
    • http://ackerapparel.com/uploads/1/3/0/6/130639397/25bb5fc98a95.pdfIn PDF document text
    • http://tablapizza.net/uploads/1/3/0/7/130776558/7236424.pdfIn PDF document text
    • http://icomuniquese.net/uploads/1/3/1/4/131453329/4983088.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_off000040d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40D0 8848 bytes
SHA-256: 0d8878cc56a26b9ec1a54d8403f5c2a38082c731a7fc7580ddb2d8989f88d4c7

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