Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6758b6968d4325…

MALICIOUS

PDF

31.7 KB Created: 2020-04-05 10:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5931724347161dee4fe2b9b5baf76ecf SHA-1: 9ab89fc349fec432cf13b622f4e2ac4d7bb73d77 SHA-256: fa6758b6968d4325ef59ff4e30104d4e46de9852e22225f1c2f8ce16dea774f5
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF documents hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body text, though garbled, contains a URL that is part of this link farm. This suggests a tactic to manipulate search engine results or to distribute a large volume of content, potentially malicious, across many domains. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://inthefield.us/uploads/1/3/0/6/130639565/130639565.html#libro+de+formacion+civica+y+etica+de+cuarto+grado+de+primaria+pdf
    • http://cindykuan.com/uploads/1/3/1/4/131437886/896428.pdf
    • http://101winecentral.com/uploads/1/3/0/2/130291527/gumali.pdf
    • http://rubinialeal.com/uploads/1/3/0/5/130544379/6e7fa896.pdf
    • http://bikeyaks.com/uploads/1/3/0/5/130539054/1bb0c98dab.pdf
    • http://couchpenniesfoundation.org/uploads/1/3/1/4/131411596/5377700.pdf
    • http://art-by-coco.com/uploads/1/3/0/5/130550797/77304.pdf
    • http://thecarpetcornermund.com/uploads/1/3/0/6/130604708/2792115.pdf
    • http://maketober.com/uploads/1/3/1/4/131406449/6eddc.pdf
    • http://actualizedreams.com/uploads/1/3/0/6/130603913/niwave.pdf
    • http://ludotbags.com/uploads/1/3/0/6/130639652/bbb21a82ece69c6.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_off0000527a.bin
eb19b5e17a8e4ae05aa1d217eac70f91fe7f884b5cbf2ced24dfc7d2db7732d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x527A 7960 bytes

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