Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb11f722566b1cd3…

MALICIOUS

PDF

41.4 KB Created: 2020-11-05 09:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 93251695569bcdd50a11e7160410ffdf SHA-1: d75ffc174ea3b3e7fe3e4fba43e64570526068c5 SHA-256: eb11f722566b1cd30dc3921a34067331d581c1973f2123453e271942fdf62d87
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The primary intent appears to be directing users to malicious infrastructure, likely for SEO spam or phishing, as indicated by the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=tap+tap+fish+mod+apk+free+shopping In PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/pijukudopum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_5fa0b7a31ba71.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/8304300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5fa15ddc8a12c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f99bd07ef758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_5f9e8eec2f99e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f8e79be7585b.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/popagexexoza/summit_view_elementary_co.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/adenocarcinoma_de_cabeza_de_pancreas.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/torolobarekuxilop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1255e9f0-df01-441e-a727-486c49558b4f/baliwevotozule.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/cartier_love_bracelet_replica_20_cm.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/702934266.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_off00006212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 5436 bytes
SHA-256: 26004ad84e784d9afd973ccfdd3c9ae33dfea2757224f40ff4042f0067229827
font_01_sfnt_off00007468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 10452 bytes
SHA-256: 671c8e83163d5097c7c7230617ab546284ee0d6477f0531c373e692047e4dcbd

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