Malicious PDF — malware analysis report

Static analysis result for SHA-256 8313eba923bb2015…

MALICIOUS

PDF

30.1 KB Created: 2020-06-02 03:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66f4674144dcc8c17c385b827e2c8bb6 SHA-1: 4e018d5c840cad2d5ee13d132be505bdf08853a2 SHA-256: 8313eba923bb20157a51c03b9ab6b3a759140a2f05d396852df4a0db85c773a2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The embedded URLs point to various domains, many of which are likely part of this scheme. No scripts were extracted, but the presence of numerous external links indicates a potential for malicious redirection or content delivery.

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://securerelocationservice.com/uploads/1/3/1/1/131163687/131163687.html#calculo+de+una+variable+dennis+zill
    • http://harmonscustommadegrills.com/uploads/1/3/0/7/130738615/jijufalu_lelenoxo_wupemofi.pdf
    • http://woodmgmtservices.com/uploads/1/3/0/8/130874617/3ef695fe9bfb3.pdf
    • http://mrshalford.com/uploads/1/3/0/4/130476751/tepan.pdf
    • http://sunrisemotel.org/uploads/1/3/1/4/131406831/sulikazeneve.pdf
    • http://southernprovision.store/uploads/1/3/0/6/130605178/pudubiforox.pdf
    • http://ilovekarns.org/uploads/1/3/1/3/131379949/xikodusemudog.pdf
    • http://securerelocationservice.com/uploads/1/3/1/1/131163687/terms.html
    • http://securerelocationservice.com/uploads/1/3/1/1/131163687/dmca.html
    • http://securerelocationservice.com/uploads/1/3/1/1/131163687/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vonemimul.files.wordpress.com/2020/05/33130221196.pdf
    • https://zutiguj.files.wordpress.com/2020/05/98464153796.pdf
    • https://wugozuti.files.wordpress.com/2020/06/lejuvonurapulaxegipowusaf.pdf
    • https://vuremaxetil.files.wordpress.com/2020/06/kasazitepikutavutawe.pdf
    • https://wafamuw.files.wordpress.com/2020/05/46129497483.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049af.bin
e12578d1ef966cfb7a8a3183e4a8f5e94a56ed327502fd375561e417795b5fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49AF 10244 bytes

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