Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb60ad992ac77ee6…

MALICIOUS

PDF

29.9 KB Created: 2020-06-15 22:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1e5221e617919336f2efad324078439 SHA-1: e7f285d07c25b6bbc3d7d6269ad6f63f4b5de3be SHA-256: fb60ad992ac77ee6ab958b95b20360585b1eb8722c3e55fcb4ba236f9923a0b7
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though heavily obfuscated, contains references to 'Urdu digest novels pdf' and metadata indicating it was generated by wkhtmltopdf. This suggests the PDF is part of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious or low-quality websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://wilmingtonladiesteawalk.org/uploads/1/3/0/4/130476721/130476721.html#urdu+digest+novels+pdf
    • http://thebriefrelief.com/uploads/1/3/0/8/130874123/7534630.pdf
    • http://bbbonnenuit.com/uploads/1/3/0/8/130813757/6205126.pdf
    • http://allsewingmachinemanuals.com/uploads/1/3/0/6/130621303/9498666fc9ef.pdf
    • http://kernneuroscienceconsulting.com/uploads/1/3/0/4/130489297/rusosigaril_likafolugax_lerofegise_jojobelixivezup.pdf
    • http://truentertainmentrecords.com/uploads/1/3/1/4/131483830/e561905e35.pdf
    • http://devinandjessica.com/uploads/1/3/0/9/130969596/4133444.pdf
    • http://clubedetrocaaltoparaiso.org/uploads/1/3/1/0/131069869/muvureve.pdf
    • http://mail.kilaueakoons.com/uploads/1/3/0/8/130874384/5d2c98cf61f43.pdf
    • http://ssicards.org/uploads/1/3/0/6/130605325/wagesa.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_off00004cd3.bin
2cffaf6a65836161faf2cf2d2ac85c9d5072023aea5715cb323e112620ca0181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD3 9476 bytes

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