Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de96a5594be297d…

MALICIOUS

PDF

48.6 KB Created: 2020-04-01 17:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0b9fbe4f9acfdd893cb3d71801486892 SHA-1: 692d335a64f0336e34bb22aa79f0120d6f7c9c14 SHA-256: 7de96a5594be297d11ee56e5387983f90d97ed533160aeb04ee52d18fe4d40fc
94 Risk Score

Malware Insights

MITRE ATT&CK
T1599 Subvert-Access Control T1204 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The document body contains a Spanish phrase related to forgiveness and metadata indicating it was generated by wkhtmltopdf. The primary intent appears to be directing users to a network of websites, likely to distribute further malware or engage in fraudulent activities.

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://insurewithhoward.com/uploads/1/3/0/6/130621500/130621500.html#versiculos+biblicos+acerca+del+perdon+de+dios
    • http://impactproductionsgroup.com/uploads/1/3/1/3/131382330/komimusumutojawupo.pdf
    • http://aehuppert.com/uploads/1/3/0/2/130289610/9303575.pdf
    • http://thekairoscentre.com/uploads/1/3/0/7/130739781/fofevatavilozu_rukuloma_wakig_refabese.pdf
    • http://sallycasey.com/uploads/1/3/1/3/131384226/nufitup.pdf
    • http://rebeccajewsbury.com/uploads/1/3/0/5/130546574/selonudiminuxivoji.pdf
    • http://bachirfall.eu/uploads/1/3/0/5/130589431/319938.pdf
    • http://abesarthouse.org/uploads/1/3/0/4/130483903/buronodabur.pdf
    • http://bemedia.info/uploads/1/3/0/8/130814492/naketabujufix.pdf
    • http://beachhoneymoonsanddestinationweddings.com/uploads/1/3/0/3/130312944/naruj-pofenotatuv.pdf
    • http://anaestheticslondon.com/uploads/1/3/0/4/130476396/raravezasemur-miludafine.pdf
    • http://ezramayled.com/uploads/1/3/0/6/130621606/44195d5118311.pdf
    • http://hoquinai.com/uploads/1/3/1/4/131453259/2230442.pdf
    • http://il-giardino-segreto.com/uploads/1/3/0/5/130540193/2e05a1d1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088db.bin
39936bbe8da83bcff6b9ba7ae2cd5148ebd60f4f2ca3a1819eeb090b24c78aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88DB 8980 bytes
font_01_sfnt_off0000a992.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA992 2596 bytes

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