Malicious PDF — malware analysis report

Static analysis result for SHA-256 0540a131fc86f742…

MALICIOUS

PDF

44.1 KB Created: 2020-06-05 02:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 44a80528bee17b9c011e2701e2c7bef1 SHA-1: c333bc3be02e9ee29527f37ce37a09fb2c3fcfd8 SHA-256: 0540a131fc86f742e04746da5228e7a7ddc02abf5ce685689b8e1ca57fb229b3
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and URLs, including 'http://spicyglitter.com/uploads/1/3/0/6/130620838/130620838.html#h%25C4%25B1zl%25C4%25B1+ve+%25C3%25B6fkeli+tokyo+drift+indir+t%25C3%25BCrk%25C3%25A7e+dublaj', which appears to be a lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to direct users to potentially malicious external content.

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://spicyglitter.com/uploads/1/3/0/6/130620838/130620838.html#h%25C4%25B1zl%25C4%25B1+ve+%25C3%25B6fkeli+tokyo+drift+indir+t%25C3%25BCrk%25C3%25A7e+dublaj PDF link annotation
    • http://park100-building70.com/uploads/1/3/0/5/130546574/4107298.pdfIn PDF document text
    • http://thenovelhouse.com/uploads/1/3/0/8/130874285/2312910.pdfIn PDF document text
    • http://hostmaster.eden-hart.com/uploads/1/3/0/6/130621002/rafopaleperutinubija.pdfIn PDF document text
    • http://nex7.tv/uploads/1/3/0/6/130620618/1945370.pdfIn PDF document text
    • http://riinabodyart.com/uploads/1/3/0/5/130545816/31747e0c16f.pdfIn PDF document text
    • http://affordablechattanoogahandyman.com/uploads/1/3/0/6/130620585/daporefuduma_roxilivimofubu_veruvuf.pdfIn PDF document text
    • http://kevinpistole.com/uploads/1/3/0/6/130620563/9665059.pdfIn PDF document text
    • http://rewindind.com/uploads/1/3/0/4/130483348/9e8ed3acf0be2c.pdfIn PDF document text
    • http://spicyglitter.com/uploads/1/3/0/6/130620838/terms.htmlIn PDF document text
    • http://spicyglitter.com/uploads/1/3/0/6/130620838/dmca.htmlIn PDF document text
    • http://spicyglitter.com/uploads/1/3/0/6/130620838/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bovumafinimi958902490.files.wordpress.com/2020/06/49525782957.pdfIn PDF document text
    • https://fewogixaba.files.wordpress.com/2020/06/31048797416.pdfIn PDF document text
    • https://gopapuwoko.files.wordpress.com/2020/06/lusilerejifafizam.pdfIn PDF document text
    • https://tolefeguxi.files.wordpress.com/2020/06/wenaxaka.pdfIn 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_off0000736e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736E 15752 bytes
SHA-256: 154a22528aa649fa5621227243da38778121cca84b9d3f0df2c6b7de3b08885f

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