Malicious PDF — malware analysis report

Static analysis result for SHA-256 3895f420e97b2e61…

MALICIOUS

PDF

38.2 KB Created: 2020-04-15 11:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c079a561dbccad8ae6673ccbd0b313b8 SHA-1: bccbbbb9264fae1610333a28e7fa6ebf74deeb1c SHA-256: 3895f420e97b2e61d5408f57691724d1722a53ff2927e740dbd4da7df5863cbf
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which are numerically or generically named PDFs hosted on unrelated domains, indicating a link farm for SEO manipulation or traffic redirection. The primary external URI points to a page with a title suggesting 'big data analytics in india', likely a lure to encourage clicks. No scripts were extracted, but the extensive use of external links suggests a drive-by download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://loskuatro20decalifornia.com/uploads/1/3/1/0/131070765/131070765.html#big+data+analytics+in+india+pdf
    • http://kindredcounselling.com/uploads/1/3/0/4/130483957/4660714.pdf
    • http://sulphursoccer.com/uploads/1/3/1/4/131437785/e9d961ce7.pdf
    • http://calvarynewlifesa.net/uploads/1/3/1/1/131163590/dewapasekunur-gobigovujijawoz-laxax.pdf
    • http://duanecottrell.com/uploads/1/3/1/4/131454503/rewed.pdf
    • http://dibintibalongoenterprise.com/uploads/1/3/0/7/130776750/4bcfc800.pdf
    • http://jbgeneralservicesinc.com/uploads/1/3/0/7/130740054/jeluku_zovamola_zorofewefodevaw_jijuvepiragikop.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_off00006484.bin
989229f87874cdedb4b8b2c1e386bb8c9897510aebfc07c35a5021ff8e2eb9a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 8196 bytes
font_01_sfnt_off00008457.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 1708 bytes

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