Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa77c7b8633f9c6…

MALICIOUS

PDF

32.0 KB Created: 2020-06-07 16:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 4cf00796b02e0588f1c4392a4aa0b83d SHA-1: b8ab0931f76e7a3e9861562783dc580812855403 SHA-256: 3fa77c7b8633f9c6b8d6a10bc9c43df2bf80ff27a9cd330811ed399b282bc9f8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a phishing campaign. The document body contains text related to 'Ygs soru bankas1 indir', which may be a lure. No scripts were extracted from this sample.

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://princetonivyclub.com/uploads/1/3/1/3/131398281/131398281.html#ygs+soru+bankas%25C4%25B1+indir PDF link annotation
    • http://mta-sts.mx.clintonpottery.com/uploads/1/3/0/6/130639410/guguj-buvikivejudut-mixul.pdfIn PDF document text
    • http://hsh.org.uk/uploads/1/3/0/4/130478203/9752080.pdfIn PDF document text
    • http://akasha-plane.org/uploads/1/3/0/5/130550921/raturepawelifu_mimolomimu_texivogaraboko_poxigozedobaba.pdfIn PDF document text
    • http://bluecalliope.com/uploads/1/3/1/6/131606122/xelekaz.pdfIn PDF document text
    • http://sparkwiththesmiths.com/uploads/1/3/0/4/130490915/1187423.pdfIn PDF document text
    • http://waveapparat.com/uploads/1/3/0/4/130488631/1458173.pdfIn PDF document text
    • http://hillheads.co.uk/uploads/1/3/0/9/130970023/vabizuxuzup.pdfIn PDF document text
    • http://vanelzakker.net/uploads/1/3/1/3/131398195/9cdf7ca481a78.pdfIn PDF document text
    • http://northeastohiodukes.com/uploads/1/3/0/5/130588307/2b349915d35.pdfIn PDF document text
    • http://steaminmotion.com/uploads/1/3/0/5/130547038/c6279b.pdfIn PDF document text
    • http://henryrathbun.com/uploads/1/3/0/5/130590257/pufoz.pdfIn PDF document text
    • http://freelancementor.com/uploads/1/3/0/8/130874565/vebezapimirezew.pdfIn PDF document text
    • http://racebook.epm3ltd.com/uploads/1/3/0/6/130604948/jenujus_vimigitamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bekururumema.files.wordpress.com/2020/06/voxagan.pdfIn PDF document text
    • https://lawikisuj.files.wordpress.com/2020/06/tujoliworem.pdfIn PDF document text
    • https://xovupizi.files.wordpress.com/2020/06/xewibenitigexowumuwo.pdfIn PDF document text
    • https://wixamufutize.files.wordpress.com/2020/06/nexoluxu.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_off00005171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5171 10444 bytes
SHA-256: f86d903b67022a93f7b61d86816ced6dbea328355d7d573720050eeaacad9ec1

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