Malicious PDF — malware analysis report

Static analysis result for SHA-256 074225abdeac3df0…

MALICIOUS

PDF

36.0 KB Created: 2020-05-30 09:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f923e84d257417586ee46ed1f0da0a2a SHA-1: 6402647d4efcfffb02d354baa125ad0bd25da6dd SHA-256: 074225abdeac3df0daae30a78adb4b2d80f2f67bd7e1d8406390b80a6084f1af
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The embedded URLs suggest a link farm or SEO manipulation tactic, potentially used to distribute malicious content or engage in phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://mta-sts.mail.southarkfire.com/uploads/1/3/1/3/131381241/131381241.html#evo+search+for+eden+remake
    • http://ebssolarelectricandair.com/uploads/1/3/1/4/131483249/kevafusi-lopudevefuror-dagutogurafag.pdf
    • http://donalddistrictone.com/uploads/1/3/1/6/131637372/vogunox-roxoxefiwizofo-tarefaj.pdf
    • http://lloydminterpaintingandrepair.com/uploads/1/3/1/4/131483144/5024297.pdf
    • http://carsonsstorenoank.com/uploads/1/3/1/8/131856801/713b82b62c.pdf
    • http://superconscioustv.com/uploads/1/3/0/5/130539726/8332826.pdf
    • http://bloomfieldtowingservice.com/uploads/1/3/1/4/131455247/253430.pdf
    • http://fitmax.org/uploads/1/3/0/2/130272573/466565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e7.bin
4cc3614d66411e53176c69b4a96d5f9645516864299ad6705bf5921eefaa7e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 11032 bytes

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