Malicious PDF — malware analysis report

Static analysis result for SHA-256 e656b82d3ee8f715…

MALICIOUS

PDF

73.1 KB Created: 2021-01-30 18:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 95043314b932dcaaac254f60b29c2f2c SHA-1: 98ab8a19a43331bc6ea4bc10837c85e488294618 SHA-256: e656b82d3ee8f71523d5942ee6211878f7c64ae42a738d35df662ab5194c4cee
156 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, characteristic of a link farm or phishing campaign. The embedded URLs suggest an attempt to redirect the user to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 https://druttle.ru/123?utm_term=where+to+watch+jumanji+original PDF link annotation
    • https://kufobuzu.weebly.com/uploads/1/3/5/3/135330794/1143445.pdfIn PDF document text
    • http://prognoz-football.club/planos_de_portones_levadizos_manualesi9kv1.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/e88c9e35524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_600c0ddd24c93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464323/normal_5fe4644f46d6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff4185c3a8f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_5fc60baa52eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fd7bd0b1ada7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5fcf05f274cf2.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/zen_pinball_williams_ioscky8a.pdfIn PDF document text
    • http://trickyturkey.com/halloween_covid_face_masks_canada4h6in.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446377/normal_5fcc1fd690d2e.pdfIn PDF document text
    • http://construt.site/aceableagent_texas_grouponpasdi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fe46a3ed0a14.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 5216 bytes
SHA-256: 883b77d3e0092cf0bca82471df80d26dd58becce0e67ea8a509ae15fab93553d
font_01_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 11920 bytes
SHA-256: 2b379219a10953f0e642c55560a4057b3fec336b3510fa14dc35f69c44b198bc

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