Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa71d30859904d2c…

MALICIOUS

PDF

75.4 KB Created: 2021-02-14 18:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 70e506927214b98419f05d735dfda7e9 SHA-1: 2f19b24ce59a4d25ad5867fddb9dcbe4e7eeaaf5 SHA-256: aa71d30859904d2c5d13308ac79e67beaac8bf71bbf29de3ea6e2e087be1d377
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://jacksth.ru/wb?keyword=missguided%20floral%20satin%20kimono%20dress PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390092/normal_6006b6119816b.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/nenadivosefipewow.pdfIn PDF document text
    • https://gemonozuwusub.weebly.com/uploads/1/3/4/1/134131657/0026abcdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_601844a2f0f2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412894/normal_5fec2f307b45b.pdfIn PDF document text
    • http://wellwork.site/2702843680z4wc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5fe013b100d3c.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/roxavegemata_temunir_rixobewor_dazowarugofuruk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/43780131572.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/bootstrap_templates_for_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/baseball_boy_mod_apk_1._3_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/ashoka_chakravarthy_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/zemukusagelemozepegupeve.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/wosifigabuxil.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/4046774162.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 5296 bytes
SHA-256: e630e94776fcfd6f3f3cc88e74e99645bc5369816733c0bc7db965ec5af2357a
font_01_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 10812 bytes
SHA-256: 615526ef0927079a83c3dc8bbf489bea8c2f0bfa3139c54ed564eadf88af8b5b