Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11e54f59bb367ea…

MALICIOUS

PDF

71.9 KB Created: 2020-11-24 05:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fb5a9014f384a3d873d03c6ed11d8666 SHA-1: 062e0a93cf0207b97420e10d5bf344c7aeed2298 SHA-256: d11e54f59bb367ea01eef58cd139400e46874c814e36ae7c5212161333148d99
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with several pointing to known malicious redirectors and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO-based traffic redirection. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=recycled+asphalt+pavement+%2528rap%2529 In PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/nepiwirubotarupek.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/25d49d20ba47e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5f9eb7b70593e.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/4053217.pdfIn PDF document text
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/8618802.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/4671102.pdfIn PDF document text
    • https://dusuwepi.weebly.com/uploads/1/3/4/5/134589125/fosunenezuzitixefeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f8e8ef5b4ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8ab0f6c1f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5f8b194261452.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/7daf6cad8db81c.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/bezegoluzose/aida64_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b25717-e249-414f-9234-19442f10dbf6/treaty_of_versailles_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf18f75-ddd6-4e0b-8da3-c6c6f542e442/lirizagimo.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/box_turtle_care_sheet_petco.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_off0000da8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8D 5636 bytes
SHA-256: 2c4cfadb84b419ee8b4311a1221e55c4fe9dc3b755a8a6bcd8b4036fdfd16658
font_01_sfnt_off0000eda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 10784 bytes
SHA-256: d33df3a356e6109a86bf9fdc91c39d29bcfce9d57b384c8dc7a74dae34eaa53b

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