Malicious PDF — malware analysis report

Static analysis result for SHA-256 e240b85b9a12a17e…

MALICIOUS

PDF

34.3 KB Created: 2020-06-07 05:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0601b2a91489fc7566e1c2de7b377949 SHA-1: 1c6a2716ca18e7d86c3cf45b3e7b404d6689c4d8 SHA-256: e240b85b9a12a17ed3a916500e2cbf0b48fd3365d5d65e978ae5c2cba8bbfe93
92 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, pointing to multiple domains hosting PDF files. The ML classifier also strongly indicates maliciousness. No scripts were extracted, so the primary attack vector appears to be the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://marthabeautyguru.com/uploads/1/3/0/6/130604693/130604693.html#fresh+off+the+boat+season+5+episode+1
    • http://hygieneprotect.com/uploads/1/3/0/5/130588798/895187.pdf
    • http://munchandbagel.com/uploads/1/3/1/4/131406569/suwizuzijopigi.pdf
    • http://apelfuji.org/uploads/1/3/0/2/130289636/sefem-wofutukamababeb-bibopubeladavi.pdf
    • http://webmail.midstateinspectionservices.com/uploads/1/3/0/7/130739028/6297584.pdf
    • http://christinareid.net/uploads/1/3/0/2/130273573/80a47d3ebc121b.pdf
    • https://wezisigoda.files.wordpress.com/2020/06/80562279667.pdf
    • https://nepujonulovu.files.wordpress.com/2020/06/dugomodirobemaziwuk.pdf
    • https://koxibulobi.files.wordpress.com/2020/06/kawexilapov.pdf
    • https://nojowijede.files.wordpress.com/2020/06/83267658137.pdf
    • https://bosomod.files.wordpress.com/2020/06/wugiv.pdf
    • https://galikakibim368740973.files.wordpress.com/2020/06/54834403598.pdf
    • https://lagasig.files.wordpress.com/2020/06/79955582843.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_off00005afb.bin
a6332176e7dd3032dc981e733122049c3efa4d51b567efffae01a0ef8a586dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFB 10284 bytes

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