Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aee852eda38c73…

MALICIOUS

PDF

34.8 KB Created: 2020-06-12 06:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 591dfa8f54ea876871cbc52d6b704d77 SHA-1: fb423cab36df56125fa106b26adccc2d2eaf88ea SHA-256: e7aee852eda38c73e656a923694a71b341ca231dc5399d08efaf30688b73c7ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Stage Capabilities: Gather Victim Identity Information T1204 User Execution: Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm. The document body also contains some of these URLs, suggesting an attempt to direct users to external content. The primary purpose appears to be SEO manipulation or potentially distributing further malicious content through these links.

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://mail.humanengineersinc.org/uploads/1/3/1/3/131381135/131381135.html#center+of+gravity+worksheets PDF link annotation
    • http://believeinyounation.com/uploads/1/3/0/5/130588518/5454591.pdfIn PDF document text
    • http://mail.queriinternational.com/uploads/1/3/1/0/131070313/4240309.pdfIn PDF document text
    • http://yomammaswings.com/uploads/1/3/0/2/130273584/4847987.pdfIn PDF document text
    • http://doug-jones.com/uploads/1/3/1/8/131855981/masedar-nolosujos-xerena.pdfIn PDF document text
    • http://ashdistributions.com/uploads/1/3/0/8/130874232/jebugeziso.pdfIn PDF document text
    • http://74-123-79-170.mgwnet.com/uploads/1/3/1/6/131606065/kunibakogefasizori.pdfIn PDF document text
    • http://doubleheartsoapcompany.com/uploads/1/3/0/3/130312952/2612be8f6ac7.pdfIn PDF document text
    • http://narchacks.com/uploads/1/3/0/5/130590710/8403828.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xulugotar.files.wordpress.com/2020/06/varesejezokedatulepadapar.pdfIn PDF document text
    • https://forivugovov.files.wordpress.com/2020/06/wixedefuvobanubewolu.pdfIn PDF document text
    • https://kurupava.files.wordpress.com/2020/06/mugemakuzidupedanema.pdfIn PDF document text
    • https://zevozifi.files.wordpress.com/2020/06/97635756877.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_off00005c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C89 10412 bytes
SHA-256: 8b14d5b4863fa5849d637d693bde5a584e037cdca36207113962f2828e701456