Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12b60864a459efb…

MALICIOUS

PDF

54.9 KB Authoring application: Solid Converter PDF
MD5: cbd9bb5b14571e7230a13e45ff87ef75 SHA-1: ae75ed94195cfcc38693cf22b3b1d560b5647b56 SHA-256: b12b60864a459efbd0ce05b9a0b896f177fc1cbef8e312b8eaa666c36649808c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output further support a malicious classification. The document body contains garbled text and a reference to an outdated Internet Explorer version, which may be a lure to encourage interaction with the embedded links. No scripts were extracted from this sample.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://rbuels.org/uploads/1/3/0/6/130604287/budegoxif_jozagejolepemi_vekaj_dutewalizus.pdf
    • http://stepbystepfacilitationcenter.com/uploads/1/3/0/2/130270917/8925639.pdf
    • http://pelabarba.com/uploads/1/3/0/6/130604962/060de48.pdf
    • http://mkhealthcareclinic.com/uploads/1/3/0/5/130588999/kapoxonutukavos_fufaz_donojujolu_tifunororakuwaj.pdf
    • http://yolodestinationparties.com/uploads/1/3/0/4/130483338/4149be675ba5.pdf
    • http://bannockburngreen.com/uploads/1/3/0/7/130738715/wopoka.pdf
    • http://sheri-johnson.com/uploads/1/3/0/8/130814784/3458149.pdf
    • http://youmeandfivebucks.com/uploads/1/3/0/6/130621213/8943565.pdf
    • http://noypbc.co.nz/uploads/1/3/0/4/130436315/5031326.pdf
    • http://amberbeuthien.com/uploads/1/3/0/5/130546885/2376143.pdf
    • http://beaubland.com/uploads/1/3/0/2/130291589/e26214e2321.pdf
    • http://redmaplecelpipedu.com/uploads/1/3/0/6/130621588/8204208.pdf
    • http://wamits.com/uploads/1/3/0/3/130379231/xapozi_fumorazo.pdf
    • http://ilovefatjacks.net/uploads/1/3/0/6/130604370/nafevelogaru.pdf
    • http://missoulaimports.com/uploads/1/3/0/3/130379504/1071546.pdf
    • http://essentialcleaning.vegas/uploads/1/3/0/7/130739197/wumofipisibafu.pdf
    • http://slforeignpolicy2017.lk/uploads/1/3/0/8/130874395/rovusafixu-xosuda-runefavibego-worudodivu.pdf
    • http://michaelhiggins.ie/uploads/1/3/0/4/130488500/130488500.html#factors+affecting+the+academic+performance+of+students+thesis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001390.bin
70e98f2d0085b963e84cafbedd4864b640648c701592678d023164805539d18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1390 8880 bytes

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