Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eae3548b28992ab…

MALICIOUS

PDF

36.6 KB Created: 2020-06-05 22:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 87e1a53ec39b1048b5544f3045c55d2a SHA-1: fb4c713ce7e58090dd74739df70abe2a7dfe86e8 SHA-256: 3eae3548b28992abd65780ad88d6eefaf6094f358a8b654c0dca14a92c070dfb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, pointing to numerous PDF files hosted on various domains. The document body itself is heavily obfuscated but contains some of the URLs, reinforcing the link farm tactic. No scripts were extracted, limiting the analysis of direct payload execution.

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://zrvcgh.bdgct.com/uploads/1/3/0/6/130621568/130621568.html#hifumi+togo+persona+5 PDF link annotation
    • http://way-ward.com/uploads/1/3/1/3/131383767/8408570.pdfIn PDF document text
    • http://ga400portfoliofinancing.com/uploads/1/3/0/2/130289236/8352709.pdfIn PDF document text
    • http://williamsamuelphotography.com/uploads/1/3/0/2/130289236/105316.pdfIn PDF document text
    • http://gregoryjosephlujan.com/uploads/1/3/0/9/130969639/6376271.pdfIn PDF document text
    • http://moonandbackministries.com/uploads/1/3/1/1/131164557/2064745.pdfIn PDF document text
    • http://glowbearcare.com/uploads/1/3/0/6/130605010/sogazu.pdfIn PDF document text
    • http://thesavvygirlguide.com/uploads/1/3/0/6/130605179/febenolirujijuleroto.pdfIn PDF document text
    • http://kvistmenn.is/uploads/1/3/0/8/130815140/fesiminute.pdfIn PDF document text
    • http://rgbcltd.com/uploads/1/3/1/4/131407760/pugid.pdfIn PDF document text
    • http://zrvcgh.bdgct.com/uploads/1/3/0/6/130621568/terms.htmlIn PDF document text
    • http://zrvcgh.bdgct.com/uploads/1/3/0/6/130621568/dmca.htmlIn PDF document text
    • http://zrvcgh.bdgct.com/uploads/1/3/0/6/130621568/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bazolexadole.files.wordpress.com/2020/06/duvowemuruzatuju.pdfIn PDF document text
    • https://mesibef.files.wordpress.com/2020/06/94136446992.pdfIn PDF document text
    • https://zumulugumi.files.wordpress.com/2020/06/zukorumamuzifolepekaroxob.pdfIn PDF document text
    • https://tufegutoxa.files.wordpress.com/2020/06/dukomi.pdfIn PDF document text
    • https://goxiwafiwavi.files.wordpress.com/2020/06/27268806540.pdfIn PDF document text
    • https://tugujaza.files.wordpress.com/2020/06/62966312526.pdfIn PDF document text
    • https://ladareguk.files.wordpress.com/2020/06/18847731944.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 3

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_off00006367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6367 10232 bytes
SHA-256: 0b3612504e95c1a8bb9d6b28fde2c95c1003d8ff05204b8b92055d2124339ac1

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