Malicious PDF — malware analysis report

Static analysis result for SHA-256 488e1509c113aeab…

MALICIOUS

PDF

49.2 KB Created: 2020-04-06 08:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a08ed6854bf8bc8d8dad2da2da214252 SHA-1: ad1f739d4f78a060afcc0cf7ff690aead8c1d3ca SHA-256: 488e1509c113aeabc09a2bb2361f83fe1a03609c39da831cc84374634cda80c0
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of SEO poisoning or link farm abuse, as indicated by the PDF_SEO_LINK_FARM heuristic firing. It contains numerous external links to PDF files hosted on various domains, suggesting an attempt to lure users to malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of external links points to a distribution or redirection mechanism.

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://oyin-beauty.com/uploads/1/3/0/7/130776841/130776841.html#animorphs+book+14
    • http://mouthriver.com/uploads/1/3/0/9/130969509/zatizexos.pdf
    • http://voscm.com/uploads/1/3/0/4/130436130/dabazuradikej.pdf
    • http://kathiewarrenartist.com/uploads/1/3/1/3/131381144/rurujobokupeji.pdf
    • http://tanyab.net/uploads/1/3/0/8/130874676/pabodenexatuvirulu.pdf
    • http://volunteercoffeehouse.com/uploads/1/3/1/1/131164424/7635142.pdf
    • http://caatje.blog/uploads/1/3/0/2/130274376/foxopoxifiz.pdf
    • http://rauldelacruzlinacero.com/uploads/1/3/0/6/130621086/boxiboput.pdf
    • http://royalradianceglamour.com/uploads/1/3/0/4/130435652/27ff8d24be4.pdf
    • http://lawyerada.com/uploads/1/3/1/4/131453592/rubobagaru.pdf
    • http://tangentart.org/uploads/1/3/1/1/131164251/kulupa.pdf
    • http://abundantlifehealthandwellness.net/uploads/1/3/0/6/130620402/tomokulevuwufur_tebiki_ravodi_dumezezazi.pdf
    • http://milesbetter.info/uploads/1/3/0/6/130640032/lorukobazavemi_panojilesozok_morizatix.pdf
    • http://alejandroariza.info/uploads/1/3/0/4/130476043/porofeb-vixazukedek-delerebabef.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_off00007e4e.bin
d67e76e88cf7cf2ceccdd79f2b64b41d9bc183ede8c274c0cbd1120dde4558a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 9272 bytes
font_01_sfnt_off00009ff0.bin
5166831f7926234364cc1eb70222d2abe5179529f973178ef8890ed96406e31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF0 17028 bytes

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