Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eb9fa9f16ecdf5…

MALICIOUS

PDF

54.9 KB Created: 2020-06-04 05:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 3c8f57b617b0dab95860524279023239 SHA-1: 16df5cc323e965712a35dd205e28f5e2af484444 SHA-256: e9eb9fa9f16ecdf508b5e41400467acab4ab52995bce0d8c60ccbdb71e041412
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was identified as malicious by ClamAV with the signature Pdf.Dropper.Agent-8862603-0. Static analysis revealed a significant number of external links, many of which are structured as SEO-optimized PDF links pointing to various domains. The document body, though heavily obfuscated, contains references to 'managerial accounting' and URLs that appear to be part of a link farm, suggesting a lure to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-8862603-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8862603-0
  • 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://mountainevergreens.com/uploads/1/3/0/7/130738628/130738628.html#managerial+accounting+for+managers+3 PDF link annotation
    • http://hrmarketingpartners.com/uploads/1/3/0/6/130621226/1347317.pdfIn PDF document text
    • http://freedom-process.com/uploads/1/3/0/6/130604486/2554531.pdfIn PDF document text
    • http://blockchaintradingllc.com/uploads/1/3/0/6/130621788/3219714.pdfIn PDF document text
    • http://bakinlifebetter.com/uploads/1/3/0/8/130815140/refafu.pdfIn PDF document text
    • http://sandersclosingsllc.com/uploads/1/3/1/8/131872149/b5098.pdfIn PDF document text
    • http://mta-sts.mx.eaglestudent.org/uploads/1/3/0/2/130288301/dea169f40640904.pdfIn PDF document text
    • http://webmail.oneworldcircus.com/uploads/1/3/0/8/130874451/9782885.pdfIn PDF document text
    • http://mcgrath.business-facebook-covid19.com/uploads/1/3/0/8/130874504/xatate_kukoxol_vemas_dekekokozaroxum.pdfIn PDF document text
    • http://mountainevergreens.com/uploads/1/3/0/7/130738628/terms.htmlIn PDF document text
    • http://mountainevergreens.com/uploads/1/3/0/7/130738628/dmca.htmlIn PDF document text
    • http://mountainevergreens.com/uploads/1/3/0/7/130738628/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://besolofebuna.files.wordpress.com/2020/06/tipopam.pdfIn PDF document text
    • https://rawosevatati.files.wordpress.com/2020/06/jukexat.pdfIn PDF document text
    • https://vupedobe.files.wordpress.com/2020/06/pizaputafakufakilazum.pdfIn PDF document text
    • https://feruvef.files.wordpress.com/2020/06/52000665474.pdfIn PDF document text
    • https://saxabike544035375.files.wordpress.com/2020/06/zukuxosalofasapinorin.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD40 10116 bytes
SHA-256: 0e42717e4d44069783f2525471132478e475a924846b95ad3b32f1cf6ad5011b

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