Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a43aa277151507…

MALICIOUS

PDF

66.7 KB Created: 2021-02-11 19:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 747f5b4e12dc33c04f530a771869dccf SHA-1: c1b4e9893eea8468e4aecbfa33418c591e42ad9f SHA-256: 52a43aa2771515075ec7e20636d41d894eddf6aa7dddebe6d724f3c12fc9bf19
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://druttle.ru/wix?keyword=insula+occidentalis+monsters PDF link annotation
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/b76d43f852e0a.pdfIn PDF document text
    • http://nashremont.site/mr_meeseeks_box_o_fun_instructions11rfy.pdfIn PDF document text
    • http://csxmoney.info/97650857958928ac.pdfIn PDF document text
    • https://cdn.sqhk.co/vigibizez/icjeDjd/rainway_roblox_booga_booga.pdfIn PDF document text
    • http://moviesaddaa.online/289584262376f35k.pdfIn PDF document text
    • https://cdn.sqhk.co/nodomepe/hnghiiA/bone_infection_tooth_symptoms.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/sibeziradokix.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/fgh9Ygh/41563728700.pdfIn PDF document text
    • http://9gusevshop.website/687100241032824a.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/lepasuwa_pibawizedene.pdfIn PDF document text
    • http://awpmode.com/labanibudotal59g5g.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/tejuvonixag/business_process_flow_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/telecharger_clavier_arabe_pour_android_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/fudegusunorujivoj.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bapinefunukoxetariradevot.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_off0000ca08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA08 5020 bytes
SHA-256: fdd23c0e6b12c907df161243c49f6085a0c6f0a701add35243b0ceb520669f96
font_01_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 10240 bytes
SHA-256: 5f2fe57f52b38ac1e843ff3270f792081f4dfdeff23d1752da550c2e5d3b5846