Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82e86b5803a7cf5…

MALICIOUS

PDF

67.4 KB Created: 2020-12-28 15:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a927a12d8dc096b94d2be8f4ae45e2cd SHA-1: 84c0aebd9b2318e02394d9044c789f16cc5e8211 SHA-256: c82e86b5803a7cf5341a21c3c27354fa7f00dd0b12c75ece2ad55a458ce7e60a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious due to its function as a redirector and link farm, pointing to numerous external URLs, one of which is a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links are designed to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=castaway+bay+waterpark+prices In PDF document text
    • https://detagugijubofex.weebly.com/uploads/1/3/4/3/134365812/9928502.pdfIn PDF document text
    • https://jozifopavix.weebly.com/uploads/1/3/4/3/134355896/2280215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_5fbbda233211e.pdfIn PDF document text
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/1581521.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/foketejejotasegox.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/a58adbc9ad7dd.pdfIn PDF document text
    • https://limowofexi.weebly.com/uploads/1/3/4/2/134235517/punuvexibuja.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/xuxifuzituwu/jorabujalujawadajiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c14272-e85d-4c12-8627-16cc8fe8d1ed/eso_beldama_wyrd_tree.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/93089154603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf07dae-96ce-4cda-bffb-d29816ec240b/xexetiwizev.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/art_of_public_speaking_13th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/application_format_for_withdrawal_certificate_from_college.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_off0000cca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA2 5200 bytes
SHA-256: 34a0d571f2431e0ad668387039e3b7faf0aa464baa37a88fedd3b81347a4e5b7
font_01_sfnt_off0000de72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE72 10060 bytes
SHA-256: 377648a11eb17ac50018659b2b999cb726dc5d61099c37e3495fc5a4d5cf8590

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