Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e70bbc1637232b…

MALICIOUS

PDF

75.1 KB Created: 2021-02-01 06:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 17ba3e59ea26d09d7dfa8b2d38cc7335 SHA-1: 1409f558d99cd682eaa325efb3c61be2f6517c67 SHA-256: 69e70bbc1637232b3a150ef061687ec096e6a043c3c6176625f55f270434a3e3
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to drive traffic to potentially malicious sites. One such URL is https://baarspo.ru/123?utm_term=unblocked+66+ez+minecraft. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://baarspo.ru/123?utm_term=unblocked+66+ez+minecraft PDF link annotation
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/6685815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5ffd85ba17eea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_5ff9b873efd72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450640/normal_5ff15c55e68c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369183/normal_5fe2502c37138.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/jaGjifp/28788551730.pdfIn PDF document text
    • https://tirotirow.weebly.com/uploads/1/3/1/3/131380420/4613299.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/936237.pdfIn PDF document text
    • https://palujaburufo.weebly.com/uploads/1/3/2/7/132740236/6919834.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/ukgfgdm/13452099304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394072/normal_5fde782d255ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fcb99b7eda6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fe24a1a54bb8.pdfIn PDF document text
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/3f2fa742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fff57832c9c7.pdfIn PDF document text
    • https://sutogeva.weebly.com/uploads/1/3/0/7/130739298/xuritimamabaw-xivadumi.pdfIn PDF document text
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/gumapibigezuj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE884 5388 bytes
SHA-256: be7ae0aa96c6572a68a24d115e1bc66541b278c3f7c0f9e879c8888a09e024b1
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 10756 bytes
SHA-256: 2876a04210b98335083589e9ccf2a3a605b70cd110f535d44a512e3ae1173be9

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