Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce6f8064cd5778a…

MALICIOUS

PDF

39.2 KB Created: 2020-06-04 06:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: f97a9f858d5c8dc23bf7b1ac2fab3bb0 SHA-1: 68a39f7bc8ac73e3793a0457e8a07fe06917b8a3 SHA-256: 2ce6f8064cd5778a4815439832e59a677452e4b04dc008f44a05b74a2d07cb21
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic identified a link farm structure. While no scripts were directly extracted, the presence of numerous external links suggests an attempt to lead the user to a compromised or malicious resource, potentially for further exploitation.

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://mybarrieroflavish.com/uploads/1/3/0/7/130740385/130740385.html#nvidia+3d+vision+2 PDF link annotation
    • http://boettiger.cl/uploads/1/3/0/8/130873877/xavimumomeluven_doxeboga.pdfIn PDF document text
    • http://scentcosmetics.co.uk/uploads/1/3/0/9/130970009/7d396a0fe956e.pdfIn PDF document text
    • http://thedoylehotel.com/uploads/1/3/0/5/130550800/8337724.pdfIn PDF document text
    • http://suitestaff.com/uploads/1/3/1/3/131384254/zikasisutu.pdfIn PDF document text
    • http://romboid.pl/uploads/1/3/1/3/131398373/e2abd3f058d6d6.pdfIn PDF document text
    • http://newmarketmedia.biz/uploads/1/3/0/9/130969825/0d28b1437fae6e.pdfIn PDF document text
    • http://mail.outonthetowntransportation.com/uploads/1/3/1/3/131383548/9244288.pdfIn PDF document text
    • http://notforsakenministryinc.org/uploads/1/3/0/6/130604049/6331695.pdfIn PDF document text
    • http://evamacdonald.co.uk/uploads/1/3/1/8/131857049/aab9c.pdfIn PDF document text
    • http://mybarrieroflavish.com/uploads/1/3/0/7/130740385/terms.htmlIn PDF document text
    • http://mybarrieroflavish.com/uploads/1/3/0/7/130740385/dmca.htmlIn PDF document text
    • http://mybarrieroflavish.com/uploads/1/3/0/7/130740385/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lafukaraziba.files.wordpress.com/2020/06/popotifevumigamemodixit.pdfIn PDF document text
    • https://bijozoje568648272.files.wordpress.com/2020/06/98904959821.pdfIn PDF document text
    • https://tufegutoxa.files.wordpress.com/2020/06/dukomi.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_off00006887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 13172 bytes
SHA-256: 728cd0da77f55f8390abe57f75509d2ce1214dbe464ffea13185faa5c84a9354