Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f89c2ab8018dab…

MALICIOUS

PDF

31.5 KB Created: 2020-04-06 11:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1da4d3b5cd39347b8817d068ee463b0b SHA-1: 72d2c662ecf70a2dc3697fbd51c8d7e7edc25f70 SHA-256: b0f89c2ab8018dab44ed7ecdfb7e39cc697708609e418a5f6faac336e082676a
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured in a way that suggests SEO spam or a link farm. The document body, though partially obfuscated, contains text related to 'Salario de un analista de procesos' and includes URLs pointing to various domains. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://evokefitness.net/uploads/1/3/0/2/130287847/130287847.html#salario+de+un+analista+de+procesos
    • http://oldtymehockeyleague.com/uploads/1/3/1/4/131453540/f2c8177.pdf
    • http://psychosemantics.net/uploads/1/3/0/5/130539734/b368d7b462c.pdf
    • http://whyislam.in/uploads/1/3/1/3/131398386/c779d.pdf
    • http://thelatenightrecordshop.com/uploads/1/3/0/5/130542863/bijolaxiko.pdf
    • http://joandickinson.com/uploads/1/3/0/7/130740205/rutozafase-rimagutu.pdf
    • http://emilyritchiefitness.com/uploads/1/3/0/8/130814923/8177861.pdf
    • http://abessentials.shop/uploads/1/3/0/7/130775358/7617327.pdf
    • http://sweepsurechimneysweeping.com/uploads/1/3/0/7/130775952/182436.pdf
    • http://tallitministries.org/uploads/1/3/0/7/130776760/7622778.pdf
    • http://trinitysterileinc.com/uploads/1/3/0/9/130969424/6fecf65e4f103.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052f2.bin
b02006e5a326cfcd6ec7820c0a77b98cc9094df672a8c6ae79c58fe24f71fa72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F2 7600 bytes

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