Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2d53b21a08c110…

MALICIOUS

PDF

78.4 KB Created: 2021-03-04 01:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5ea55cfd847a6423d24146da913e8505 SHA-1: 93ba3d61821baaa2909dde8f5c8be49ca921cad3 SHA-256: cd2d53b21a08c110ba71fe691c79e83a662f87c31f065ab85f9bc83d5042f450
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/wix?keyword=scout+guide+charlottesville PDF link annotation
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/ad56a7cdf.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/gcwjaii/64740532454.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/1246487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ffcf92b6bc69.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/IpIihij/25709296360.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/3gjsmje/sisters_oregon_real_estate_rentals.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/rofuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_604017493f16f.pdfIn PDF document text
    • https://lokesikaneweb.weebly.com/uploads/1/3/1/4/131437695/4231148.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/wiwamoxamo/ielts_speaking_all_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/cd_fernandinho_galileu_ao_vivo.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/69311575950.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/16567864286.pdfIn PDF document text
    • http://xirotowukutizu.epizy.com/is_acura_expensive_to_fix.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/base64_string_file_format.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_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 5364 bytes
SHA-256: e46985d225d1892772d4b5bb93f1c39122a77e69bc1cf47cfcf936badebe7fdc
font_01_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 14816 bytes
SHA-256: e6a3fcca43dff7b9adce96028e304c2970967f4838c9d235100280d905624c26

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