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) First seen: 2020-09-24
MD5: ae4205659906bb61d5ab7b6cd6b4f94f SHA-1: a9d0a6dc8dd1587bc82e466bfd9fb42f80f4a4d5 SHA-256: 2398ec537bcb60854df8beead0e14b3f287d6de68465580498426def4bd932f9
96 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 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://xj.undesirable.us/uploads/1/3/0/5/130589360/130589360.html#vidbox+product+key+mac PDF link annotation
    • http://freelivinco.net/uploads/1/3/1/0/131070226/rojolulepis.pdfIn PDF document text
    • http://brewhousemarketandwine.com/uploads/1/3/0/6/130621552/6610610.pdfIn PDF document text
    • http://cpr-trainingclasses.com/uploads/1/3/1/8/131871614/xebedu.pdfIn PDF document text
    • http://taximurfreesboro.com/uploads/1/3/0/5/130551922/xawod-sasukujogenu-fidununowazobi.pdfIn PDF document text
    • http://schulzgroupinc.com/uploads/1/3/0/4/130476642/620300.pdfIn PDF document text
    • http://2051551albertaltd.com/uploads/1/3/0/4/130489006/fe702.pdfIn PDF document text
    • http://cwintech.net/uploads/1/3/0/3/130379841/miguwibezo_dibemo_rurakenegamizun.pdfIn PDF document text
    • http://jttechsolutions.net/uploads/1/3/0/2/130287977/gapijovigubaz-sotibafami.pdfIn PDF document text
    • http://mylifewater.nl/uploads/1/3/1/8/131858108/55f26c20df1c.pdfIn PDF document text
    • http://alwayscut.com/uploads/1/3/1/4/131453407/427942.pdfIn PDF document text
    • http://equinehealthline.net/uploads/1/3/0/9/130969399/dinadufetozaw-mutexi-vefeg-xusopatuz.pdfIn PDF document text
    • http://proedge406.com/uploads/1/3/0/4/130435955/zekovag_vonulodi_pikelesamibo.pdfIn PDF document text
    • http://clearbramilwaukee.com/uploads/1/3/0/6/130639468/2242184.pdfIn PDF document text
    • http://thegypsyvault-staywild.com/uploads/1/3/0/9/130969424/bae18.pdfIn PDF document text
    • http://semfinproduction.com/uploads/1/3/0/8/130814728/9321055.pdfIn PDF document text
    • http://integrianutrition.com/uploads/1/3/1/8/131856643/1f103f10e96a33d.pdfIn PDF document text
    • http://dlyonsconstruction.com/uploads/1/3/0/6/130620341/wiwerodevafok.pdfIn PDF document text
    • http://mjlocating.com/uploads/1/3/0/6/130620230/492e7.pdfIn PDF document text
    • http://repairandinstall.com/uploads/1/3/0/2/130289236/26709630e3.pdfIn PDF document text
    • http://ferritergroup.com/uploads/1/3/0/7/130740420/lawadidotubove_xinogu_tedazuzadovux_jekale.pdfIn PDF document text
    • http://psiclilianlemuscampos.com/uploads/1/3/0/8/130813146/3e9cd6968ab0c75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6154 10796 bytes
SHA-256: 64d152841d2422e4d286d30f7a0fceac24b42630073afc75b2296ad3bfe07b47

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