Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86a7cbbfadb4029…

MALICIOUS

PDF

34.4 KB Created: 2020-05-15 04:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 39f6697109b7bb924ccc611125d1e45d SHA-1: 199b75fea989840266b77696364c53b69e0c74f0 SHA-256: e86a7cbbfadb402903bd12b9a7c238e202ef57758a927bb9be64717275b3b8e4
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, characteristic of a link farm designed to manipulate search engine results and redirect users to potentially malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links supports this assessment. The primary attack pattern involves luring users through these links.

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://gyrotech.org/uploads/1/3/0/5/130590191/130590191.html#origami+bat+template PDF link annotation
    • http://skippergroup.eu/uploads/1/3/0/5/130551218/gupizoluf-bufofusazuluw-wokazajop-lugoki.pdfIn PDF document text
    • http://ekysports.com/uploads/1/3/1/0/131070407/984252.pdfIn PDF document text
    • http://mackenzieconrad.com/uploads/1/3/0/8/130874094/9ec134d.pdfIn PDF document text
    • http://pavedwithgood.com/uploads/1/3/0/6/130604042/2254610.pdfIn PDF document text
    • http://myoshs.com/uploads/1/3/0/7/130775593/xinoz_mozato_manapokiwetobu.pdfIn PDF document text
    • http://muttb.com/uploads/1/3/1/4/131482823/gigoxuxogak-mawijogisakezan.pdfIn PDF document text
    • http://baronauto.org/uploads/1/3/0/7/130740015/7385831.pdfIn PDF document text
    • http://verticaltech.net/uploads/1/3/0/5/130546237/04d397cf0b.pdfIn PDF document text
    • http://campbeltownhighlandgames.com/uploads/1/3/0/7/130739778/9829673.pdfIn PDF document text
    • http://3sons411.com/uploads/1/3/0/9/130969868/lobanilabafez.pdfIn PDF document text
    • http://magicaljourneypsychics.com/uploads/1/3/0/7/130775355/b189d6b011100.pdfIn PDF document text
    • http://thriftlikenew.com/uploads/1/3/0/7/130776518/loguzifizuvitonodo.pdfIn PDF document text
    • http://patagoniafriends.com/uploads/1/3/0/7/130739024/8963172.pdfIn PDF document text
    • http://my-h-online.com/uploads/1/3/0/7/130775009/zenezagi_nojufow_zoxopidet_pagesixitob.pdfIn PDF document text
    • http://robinbrons.info/uploads/1/3/1/4/131453823/dukaxo.pdfIn PDF document text
    • http://rainbowbridgebeads.com/uploads/1/3/0/6/130639552/wajivalagafajax.pdfIn PDF document text
    • http://contemplativecommunication.com/uploads/1/3/0/9/130969264/pozuz-duxojaju.pdfIn PDF document text
    • http://unrivalledathletics.com/uploads/1/3/0/2/130271042/jirobiropakixog.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 4

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_off00005a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A85 10532 bytes
SHA-256: df9ad506f9d99ec33c7519b74707be233a26d34a2808b48d52686e57da4db259

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