Malicious PDF — malware analysis report

Static analysis result for SHA-256 5904609adca80982…

MALICIOUS

PDF

38.7 KB Created: 2020-03-29 11:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 297681b1bf018dfec1c46662f61e6538 SHA-1: ab1f7e180ffcf08dd800f76678afcd85c9fe5402 SHA-256: 5904609adca8098249d5b109016ac71d4690fabf5e532f865ce20a9dbb160d2b
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to a page with the text 'Vértice ángulo que es', suggesting a potential lure or misdirection. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links, many with numeric slugs and hosted on various domains, indicates a likely attempt to distribute malicious content or manipulate search engine results.

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://74-123-73-226.mgwnet.com/uploads/1/3/0/8/130814254/130814254.html#v%C3%A9rtice+%C3%A1ngulo+que+es
    • http://bmesolutions.pl/uploads/1/3/0/4/130478704/raromosatesegenosuru.pdf
    • http://thechocolatedreamcompany.com/uploads/1/3/0/4/130483346/1694095.pdf
    • http://yasinrahim.com/uploads/1/3/0/2/130274145/598755.pdf
    • http://know-ur-worth.com/uploads/1/3/1/3/131379781/898982.pdf
    • http://bemerterapia.hu/uploads/1/3/0/6/130604632/8658305.pdf
    • http://nathanielmuncie.com/uploads/1/3/0/6/130621771/e37444d9cbe8c21.pdf
    • http://movinghouseexpert.com/uploads/1/3/0/8/130873957/godepirujanu.pdf
    • http://mcclungrealtyinc.com/uploads/1/3/0/2/130291453/398433.pdf
    • http://tiallarising.com/uploads/1/3/0/6/130620942/a3104c391ec4a24.pdf
    • http://puregoldbycdxxgenetics.com/uploads/1/3/0/6/130605017/0abc713.pdf
    • http://soundmedical.org/uploads/1/3/0/5/130540437/4103140.pdf
    • http://theforgivers.com/uploads/1/3/0/8/130874368/0779d1918ba0626.pdf
    • http://efpunited.com/uploads/1/3/0/4/130483900/5633342.pdf
    • http://kendallcountyrebels.com/uploads/1/3/0/8/130874635/rabofin.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_off00006b2e.bin
fdaf151ad99047360450b84d1a39f4f7133750e9e29489273426e9f989ff688a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2E 9116 bytes

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