Malicious PDF — malware analysis report

Static analysis result for SHA-256 2398ec537bcb6085…

MALICIOUS

PDF

36.3 KB Created: 2020-05-21 20:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae4205659906bb61d5ab7b6cd6b4f94f SHA-1: a9d0a6dc8dd1587bc82e466bfd9fb42f80f4a4d5 SHA-256: 2398ec537bcb60854df8beead0e14b3f287d6de68465580498426def4bd932f9
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO poisoning and phishing campaigns. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass external link farm, and the ML classifier strongly suggests maliciousness. The document body, though heavily obfuscated, contains URLs that are likely intended to direct the user to malicious content.

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://xj.undesirable.us/uploads/1/3/0/5/130589360/130589360.html#vidbox+product+key+mac
    • http://freelivinco.net/uploads/1/3/1/0/131070226/rojolulepis.pdf
    • http://brewhousemarketandwine.com/uploads/1/3/0/6/130621552/6610610.pdf
    • http://cpr-trainingclasses.com/uploads/1/3/1/8/131871614/xebedu.pdf
    • http://taximurfreesboro.com/uploads/1/3/0/5/130551922/xawod-sasukujogenu-fidununowazobi.pdf
    • http://schulzgroupinc.com/uploads/1/3/0/4/130476642/620300.pdf
    • http://2051551albertaltd.com/uploads/1/3/0/4/130489006/fe702.pdf
    • http://cwintech.net/uploads/1/3/0/3/130379841/miguwibezo_dibemo_rurakenegamizun.pdf
    • http://jttechsolutions.net/uploads/1/3/0/2/130287977/gapijovigubaz-sotibafami.pdf
    • http://mylifewater.nl/uploads/1/3/1/8/131858108/55f26c20df1c.pdf
    • http://alwayscut.com/uploads/1/3/1/4/131453407/427942.pdf
    • http://equinehealthline.net/uploads/1/3/0/9/130969399/dinadufetozaw-mutexi-vefeg-xusopatuz.pdf
    • http://proedge406.com/uploads/1/3/0/4/130435955/zekovag_vonulodi_pikelesamibo.pdf
    • http://clearbramilwaukee.com/uploads/1/3/0/6/130639468/2242184.pdf
    • http://thegypsyvault-staywild.com/uploads/1/3/0/9/130969424/bae18.pdf
    • http://semfinproduction.com/uploads/1/3/0/8/130814728/9321055.pdf
    • http://integrianutrition.com/uploads/1/3/1/8/131856643/1f103f10e96a33d.pdf
    • http://dlyonsconstruction.com/uploads/1/3/0/6/130620341/wiwerodevafok.pdf
    • http://mjlocating.com/uploads/1/3/0/6/130620230/492e7.pdf
    • http://repairandinstall.com/uploads/1/3/0/2/130289236/26709630e3.pdf
    • http://ferritergroup.com/uploads/1/3/0/7/130740420/lawadidotubove_xinogu_tedazuzadovux_jekale.pdf
    • http://psiclilianlemuscampos.com/uploads/1/3/0/8/130813146/3e9cd6968ab0c75.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_off00006154.bin
64d152841d2422e4d286d30f7a0fceac24b42630073afc75b2296ad3bfe07b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6154 10796 bytes

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