Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b2aba346afc5c0…

MALICIOUS

PDF

41.4 KB Created: 2020-03-16 14:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 57334e01925900bec577f92813d4669c SHA-1: 9a4ffa291ab0db511286b412e5539f19cd105024 SHA-256: b3b2aba346afc5c01ee5d1be94962877a14418b6ec295b4167fb4093ba7c4c75
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Atividades com a letra c cursiva para educação infantil' and includes a URL that points to a similar topic. The primary attack pattern appears to be SEO spam or a link farm designed to direct users to a multitude of external PDF files hosted across various domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drywallnewmarket.com/uploads/1/3/0/6/130640019/130640019.html#atividades+com+a+letra+c+cursiva+para+educa%C3%A7%C3%A3o+infantil PDF link annotation
    • http://gogotunes.com/uploads/1/3/0/4/130483230/totixorub-bigupugatol-gaketavavijod.pdfIn PDF document text
    • http://www.pathwithmia.com/uploads/1/3/0/3/130323733/9623889.pdfIn PDF document text
    • http://specifyallproof.com/uploads/1/3/1/1/131163945/8131965.pdfIn PDF document text
    • http://skgelectrical.co.uk/uploads/1/3/0/5/130588527/wimibelaxozu.pdfIn PDF document text
    • http://luvofit.com/uploads/1/3/0/5/130589144/5642294.pdfIn PDF document text
    • http://drapesmith.com/uploads/1/3/0/6/130639123/vofobazavitixutofo.pdfIn PDF document text
    • http://www.hdmperformance.com.au/uploads/1/3/0/6/130604408/febatuxu-gizonuminojet-gogalogiloxawax.pdfIn PDF document text
    • http://www.dtpropertiesnc.com/uploads/1/3/0/2/130272369/5175220.pdfIn PDF document text
    • http://hasslefreetransportsolutions.org/uploads/1/3/0/8/130813783/kimuzidudiboxed.pdfIn PDF document text
    • http://www.consciousspin.shop/uploads/1/3/0/6/130604501/5683249.pdfIn PDF document text
    • http://conduitgames.com/uploads/1/3/0/5/130539099/7242376.pdfIn PDF document text
    • http://webmail.thesmilinggoat.com/uploads/1/3/0/6/130621015/xolonisise.pdfIn PDF document text
    • http://workbirding.com/uploads/1/3/0/6/130639024/kufexuvezevus.pdfIn PDF document text
    • http://www.limit2109.com/uploads/1/3/0/6/130639672/ce57b783e.pdfIn PDF document text
    • http://eclectricity.net/uploads/1/3/0/5/130539357/d580a4f.pdfIn PDF document text
    • http://www.youkilledwesleypayne.seanbeaudoin.com/uploads/1/3/0/6/130639087/wapetuxoto.pdfIn PDF document text
    • http://rondaaurand.com/uploads/1/3/0/4/130476192/zovonipagorofi.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

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_off0000729b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 10492 bytes
SHA-256: b5ce31d0a2d75c0c9de94d3b79f8b96e060871e18a346b21f0f711f875ee05ba

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