Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acbef12c7a22055…

MALICIOUS

PDF

70.0 KB Created: 2020-06-03 22:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d89267b6e768a5f1d26f2310eac9291 SHA-1: d87be3f6fdcee4bb2c4acbc2eeba06c5ee885cca SHA-256: 0acbef12c7a22055275afe67266099f2859dbcb194208d21aa086da3b3f91400
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on suspicious domains. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded URLs suggest a malicious intent, possibly to distribute further malware or engage in SEO spam.

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://1cj.undesirable.us/uploads/1/3/1/6/131606480/131606480.html#new+holland+workshop+manuals PDF link annotation
    • http://update-customer-trx005.info/uploads/1/3/1/0/131070452/8663935.pdfIn PDF document text
    • http://mail.360church.com.au/uploads/1/3/0/9/130969483/nirojajavujivi_zunorebimu.pdfIn PDF document text
    • http://eltacoranchero.com/uploads/1/3/0/6/130639407/4947430.pdfIn PDF document text
    • http://costartersrva.com/uploads/1/3/0/5/130588384/4ed4cd5d2a18d.pdfIn PDF document text
    • http://1cj.undesirable.us/uploads/1/3/1/6/131606480/terms.htmlIn PDF document text
    • http://1cj.undesirable.us/uploads/1/3/1/6/131606480/dmca.htmlIn PDF document text
    • http://1cj.undesirable.us/uploads/1/3/1/6/131606480/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zamukesokumo.files.wordpress.com/2020/06/zopowobefixuwotatevudu.pdfIn PDF document text
    • https://mijoxumivibu248704507.files.wordpress.com/2020/06/70397468890.pdfIn PDF document text
    • https://kuperira.files.wordpress.com/2020/06/33495297047.pdfIn PDF document text
    • https://gunobuw.files.wordpress.com/2020/06/tixopewitagi.pdfIn PDF document text
    • https://munamipatex.files.wordpress.com/2020/06/fovigin.pdfIn PDF document text
    • https://susuloteteze.files.wordpress.com/2020/06/timulevijirax.pdfIn PDF document text
    • https://xezifemubet.files.wordpress.com/2020/06/duzinavusasuwa.pdfIn PDF document text
    • https://puladobino.files.wordpress.com/2020/06/91996118375.pdfIn 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 11072 bytes
SHA-256: 4379705eceb10ce6243c16f72bb6feca07705d22d0c72c158b33de335bead4d6