Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8d08b695dc549d…

MALICIOUS

PDF

69.5 KB Created: 2020-11-13 19:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8a9483adf63a755320d3796068978db SHA-1: a7ba782d42c33907c621182cd571759754208592 SHA-256: ad8d08b695dc549ddd0dcf25144d0500b314db4371e00f3ae6bf248fd17b894f
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the ML_NYX_PDF_MALICIOUS classification. The document body, though heavily obfuscated, suggests a lure related to 'Applebee's gluten free menu 2020'. The presence of numerous external links, including a link farm, further supports a phishing or malicious redirection attempt. No scripts were extracted from this sample.

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://gettraff.ru/123?utm_term=applebee%2527s+gluten+free+menu+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fa85abf312f3.pdfIn PDF document text
    • https://bufasadapigeze.weebly.com/uploads/1/3/4/3/134307931/cb9ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f06e884-76d1-44f1-8d29-16f0a811d54b/ranger_dst_2420_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c68093-ebab-4b92-983c-d1abd61e9d9b/karududuwavitukerureli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97d753f-6808-426e-b98c-9e6cdf8fa96e/futokises.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/38030533379.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/wovivavupozok.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/sijodalabutitob.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/rirabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cfadeab-bd5f-4519-81f6-b61d4ca63ff3/lejupupeda.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/giwosigisonug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc150a8d-5b6d-42be-b176-4a7037b62c32/catalizador_de_un_carro_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/lobuzubofixozapapo.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_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 5448 bytes
SHA-256: 9887aaee40fdd6353df421402b8009b4f9099e35a9e6ad76c0b9553dc6ee9729
font_01_sfnt_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 11484 bytes
SHA-256: 2bb1d615a845eacf3fa39f3745455bc5ef575f320b44bb57ab465ecaf7dacb18

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