Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec80ae80e42f696…

MALICIOUS

PDF

40.0 KB Created: 2020-06-12 03:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 537cc5009082edb67305daf6a01eda4d SHA-1: ba1d4ac145168b624077b146153ddf527f8e3648 SHA-256: 0ec80ae80e42f6967d225c74e30c240a47803c7af23850a0ce6d2f17b8c3ade7
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, identified as a link farm, suggesting a malicious intent to redirect users. The document body, though heavily obfuscated, contains URLs that are likely part of a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a high-risk attack pattern.

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://host168.carmichaelnl.com/uploads/1/3/0/5/130590420/130590420.html#interactive+bible+lesson
    • http://mail.fountainheadrandm.com/uploads/1/3/1/4/131407736/3db917b9e52584a.pdf
    • http://webdisk.ushempservices.com/uploads/1/3/0/9/130969293/medogijad_wijas_jenukipawov.pdf
    • http://theroute66xtracts.com/uploads/1/3/0/2/130272928/8793959.pdf
    • http://mareike.coach/uploads/1/3/0/7/130739688/sijupemu.pdf
    • http://aikenequestrianproperty.com/uploads/1/3/0/4/130488834/2494250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pabozig.files.wordpress.com/2020/06/26795286809.pdf
    • https://pawojoteloje.files.wordpress.com/2020/06/86902017394.pdf
    • https://lopojezo.files.wordpress.com/2020/06/26072594029.pdf
    • https://selusizaf.files.wordpress.com/2020/06/77666571406.pdf
    • https://vemazoxubisi.files.wordpress.com/2020/06/33846786776.pdf
    • https://kemelis.files.wordpress.com/2020/06/1462444369.pdf
    • https://weteritisomu.files.wordpress.com/2020/06/fijixonaxasapezatuxe.pdf
    • https://jozimuril.files.wordpress.com/2020/06/fikuzudefubanipabelilutu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd3.bin
742384b9251725d9881b5ca6c7097eebf30eb5a1cc75e128f55329e567f422f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD3 10800 bytes

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