Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa16bb2554d6fe2…

MALICIOUS

PDF

38.8 KB Created: 2020-04-07 11:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b8cddb6e7bba58ef821dc7d4d5349b9f SHA-1: 4ef83ae577e2cc58e3886612a8f9392bd54596a4 SHA-256: 1fa16bb2554d6fe2d9209ccbcc4013d1042ad9bf0b7a075b7b36f9ed46f7a997
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body, though heavily corrupted, contains a URL that is also present in the list of extracted URLs. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://daniellejoshua.com/uploads/1/3/0/8/130813364/130813364.html#juegos+rompe+hielo+para+mujeres
    • http://micasalimpiamx.com/uploads/1/3/0/8/130873830/lelaz.pdf
    • http://kimrickpools.com/uploads/1/3/0/7/130739154/torafafujok.pdf
    • http://cuttingedgemanna.org/uploads/1/3/1/1/131164460/6096015.pdf
    • http://dogger.app/uploads/1/3/0/5/130588318/6761147.pdf
    • http://elizalucindarogan.com/uploads/1/3/0/3/130323207/fa836e2cf6721c.pdf
    • http://admiralsigns.us/uploads/1/3/0/5/130589151/jevatutogimepagituka.pdf
    • http://augustandnadia.com/uploads/1/3/0/7/130739268/311189f5f2c.pdf
    • http://allegra-vins.com/uploads/1/3/1/3/131383750/tarinuketaj.pdf
    • http://ohiovacationinformation.com/uploads/1/3/0/6/130639147/0e4fb88c8a8a.pdf
    • http://shipadhoc.com/uploads/1/3/0/2/130291328/kanekemamolef.pdf
    • http://sarahbakt.com/uploads/1/3/0/7/130739141/6185818.pdf
    • http://we-need-jesus.org/uploads/1/3/0/7/130775685/4889827.pdf
    • http://signaturehalal.us/uploads/1/3/0/6/130620574/98328b1d49.pdf
    • http://urbanizacion.info/uploads/1/3/0/4/130491001/xofaxo.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_off00006e02.bin
f7b2b2eb8ceea7c8c6bf602a9db2aeb1072f35ac5141109b248f05b0784ec472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 8404 bytes

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