Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ec89f5b00bdedd…

MALICIOUS

PDF

42.5 KB Created: 2020-06-05 08:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 1d87bf2484f30813e55ecbf8233dc6c1 SHA-1: 147a27fb72929ec0b7befbd7e7f6f987598435ad SHA-256: b9ec89f5b00bdeddec6ed1c850b13a9cc693141c331557753bf4834416ecc55c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used to obscure malicious destinations and potentially engage in SEO poisoning. The document body, though partially obfuscated, references "Divinity 2 storage chest" and includes metadata from wkhtmltopdf, suggesting a lure to a fake or malicious website. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm.

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://a1209599xstreamtravel.xsideas.com/uploads/1/3/1/6/131607005/131607005.html#divinity+2+storage+chest PDF link annotation
    • http://1ae.undesirable.us/uploads/1/3/1/4/131409035/nidim-wevikis.pdfIn PDF document text
    • http://welcomehomedirectory.com/uploads/1/3/0/7/130776367/kiziladabivafub.pdfIn PDF document text
    • http://zonemaster.demasque.nl/uploads/1/3/0/6/130621243/zabovagitelufumex.pdfIn PDF document text
    • http://judymowattoutreach.com/uploads/1/3/0/3/130379527/lajixuniremalevetof.pdfIn PDF document text
    • http://qerreti.ch/uploads/1/3/0/5/130589180/tarogonajeri.pdfIn PDF document text
    • http://mx.knightess.com/uploads/1/3/0/7/130776060/gunipulijezaloruj.pdfIn PDF document text
    • http://essome.com/uploads/1/3/0/3/130323616/a3d6d74f1f4.pdfIn PDF document text
    • http://wellnessrestorations.org/uploads/1/3/0/6/130620804/45cdc95.pdfIn PDF document text
    • http://carmelbayplaceholder.devsite-1.com/uploads/1/3/0/7/130776103/gaful.pdfIn PDF document text
    • http://mytriplec-boutique.com/uploads/1/3/0/6/130620389/poxesilaxekilu_vewufixabolugom.pdfIn PDF document text
    • http://a1209599xstreamtravel.xsideas.com/uploads/1/3/1/6/131607005/terms.htmlIn PDF document text
    • http://a1209599xstreamtravel.xsideas.com/uploads/1/3/1/6/131607005/dmca.htmlIn PDF document text
    • http://a1209599xstreamtravel.xsideas.com/uploads/1/3/1/6/131607005/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wedidudobeve.files.wordpress.com/2020/06/gelebemekulewixumubon.pdfIn PDF document text
    • https://poliwinena278183425.files.wordpress.com/2020/06/logena.pdfIn PDF document text
    • https://bidagozali.files.wordpress.com/2020/06/zoxamet.pdfIn PDF document text
    • https://rebilademeri.files.wordpress.com/2020/06/katavaka.pdfIn PDF document text
    • https://vubajalol636514693.files.wordpress.com/2020/06/gilus.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_off0000790c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790C 10836 bytes
SHA-256: 8c030516ef254ba4ada5c497a91ab7c8d47227a4c7c83a2fc112c992f3fa8eac

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