Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba27c8eead1dd0f…

MALICIOUS

PDF

36.7 KB Created: 2020-03-25 07:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ea0704778a11d2ac81bec58076fa6d43 SHA-1: 91bba6fdc03df950d49a4c6ca5f4e05dc2e04452 SHA-256: fba27c8eead1dd0f72f22d635ed2c92fa4f3800ad2d8330bda5396b1a8418cee
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a common technique for SEO poisoning or link farming. The document body, though partially corrupted, contains a reference to 'Sears kenmore sewing machine bobbin case' and a URL that appears to be a lure for this search term. The primary heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting the document's purpose is to redirect users to potentially malicious websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://uppercapedronemedia.com/uploads/1/3/0/9/130969824/130969824.html#sears+kenmore+sewing+machine+bobbin+case
    • http://mail.stpaulspv.org/uploads/1/3/0/6/130621082/6694959.pdf
    • http://xlandersoftware.com/uploads/1/3/0/3/130379051/8460496.pdf
    • http://gsglobalservicesllc.com/uploads/1/3/0/6/130621163/lalixezumuxinewuvos.pdf
    • http://chantelleshaw.com/uploads/1/3/0/3/130323154/vinogu.pdf
    • http://mriservicesnj.com/uploads/1/3/0/7/130776132/8828697.pdf
    • http://221469454208129666.com/uploads/1/3/0/5/130546354/nemexizeb.pdf
    • http://storywings.us/uploads/1/3/0/6/130604692/4518914.pdf
    • http://calwaterforum.com/uploads/1/3/0/5/130590594/2524649.pdf
    • http://worldcas.com/uploads/1/3/0/8/130874011/5904916.pdf
    • http://kirrodesign.com/uploads/1/3/0/5/130590588/33d70a76a2ffdc.pdf
    • http://www.trarellrogers.com/uploads/1/3/0/4/130488994/leluwododix_ragafomobilupo_wixed.pdf
    • http://barnardsinkibler.com/uploads/1/3/0/7/130740375/8293537.pdf
    • http://coletteliebenberg.com/uploads/1/3/0/6/130621480/1996053.pdf
    • http://www.iamjennatorres.com/uploads/1/3/0/3/130323181/naludifode.pdf
    • http://comedyandcabaret.com/uploads/1/3/0/8/130814017/zajovesidujigew-fuzodugotuzab-suvaju.pdf
    • http://sabahhomestaykualapenyu.com/uploads/1/3/0/9/130969311/masujugotogeji-mumagisaza.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_off000067a0.bin
e849d918615e0d34ec38b1ba285475aded773229f774d325d7e959b74593f5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A0 7580 bytes

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