Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a11087e72b33e4…

MALICIOUS

PDF

33.0 KB Created: 2020-05-24 05:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 7384703eec4a05cae484cb9e144cb6e2 SHA-1: 84cc84fbcf6aaf268f46ed22853b834d569ad134 SHA-256: d8a11087e72b33e4c65e0352f847ebeeafcae4c7ec43684301c270bdb1c6920d
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 to various domains, indicating a link farm or SEO spamming operation. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. The document body itself is heavily obfuscated and contains some of the same URLs, reinforcing the idea that the primary function is to redirect users to these external resources. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://8a7ufh.bdgct.com/uploads/1/3/0/4/130436085/130436085.html#above+all+powers+music PDF link annotation
    • http://lizempathic.com/uploads/1/3/0/5/130539825/9339073.pdfIn PDF document text
    • http://money4real.org/uploads/1/3/0/5/130541744/weberurotiweb-fafeweloz.pdfIn PDF document text
    • http://tokeplusherbs.com/uploads/1/3/0/7/130739593/ca94dacea.pdfIn PDF document text
    • http://gaidid.com/uploads/1/3/0/8/130874582/lelupebowumapi.pdfIn PDF document text
    • http://vapealoha.com/uploads/1/3/1/4/131438800/4254167.pdfIn PDF document text
    • http://jewishsculptures.com/uploads/1/3/0/7/130739430/372daa84b5.pdfIn PDF document text
    • http://kayellekouture.com/uploads/1/3/0/7/130775934/7234913.pdfIn PDF document text
    • http://vapeandsmokeclub.com/uploads/1/3/1/4/131406354/5912380.pdfIn PDF document text
    • http://khibasfiberarts.com/uploads/1/3/0/6/130621951/xiziwubupi-bipufimiwo.pdfIn PDF document text
    • http://richmondvideoservices.com/uploads/1/3/0/5/130543305/wesujofoduraji_fisujafe.pdfIn PDF document text
    • http://aectperambalur.com/uploads/1/3/1/4/131437668/b2f5fd61.pdfIn PDF document text
    • http://nightanddaylocksmithnyc.com/uploads/1/3/1/4/131452823/a15292764e7c.pdfIn PDF document text
    • http://jenniferchin.studio/uploads/1/3/1/1/131164272/b1455d2e96a.pdfIn PDF document text
    • http://thecrayonstory.com/uploads/1/3/0/5/130550716/vivanixobawaxuf.pdfIn PDF document text
    • http://budstree.com/uploads/1/3/0/8/130814083/sofuwipeloxatew.pdfIn PDF document text
    • http://makemeflytravels.net/uploads/1/3/1/3/131384539/bokovukotilos_nuzibuzimi.pdfIn PDF document text
    • http://fetesetevenementsspeciaux.com/uploads/1/3/1/4/131452935/zitukeruzuxufi.pdfIn PDF document text
    • http://servicescommboard.com/uploads/1/3/0/6/130639317/7f0a23fa9.pdfIn PDF document text
    • http://yoonikorn.com/uploads/1/3/0/6/130639418/zukebejefo.pdfIn PDF document text
    • http://dereli.nl/uploads/1/3/1/4/131437736/fajinow.pdfIn PDF document text
    • http://wheelerldealer.com/uploads/1/3/1/3/131380388/tolofuvesanig.pdfIn PDF document text
    • http://crystalobregon.net/uploads/1/3/0/7/130739177/2654990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 5

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_off00005515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5515 10368 bytes
SHA-256: 84339fa2b5ee72b0b973ab3433f84f8f9f9d5e922d6ef5847e0e5638a62f0efc

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