Malicious PDF — malware analysis report

Static analysis result for SHA-256 c794bc285c3e1188…

MALICIOUS

PDF

77.3 KB Created: 2021-02-13 06:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 86fd2c4d68045b83036a4e7b6b284c59 SHA-1: af4e2411e59dbbd14d3f6aaa916498646d560919 SHA-256: c794bc285c3e1188ea70dde7d0dab5506ba462000c01d818b1771f362a6c0bb2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier, indicating it is likely a phishing or malware distribution lure. The PDF contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving directing users to potentially harmful content.

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
  • 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://bologen.ru/123?utm_term=scientific+notation+puzzle+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498324/normal_5fcaf0250a590.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403540/normal_5fe1af7062b75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449768/normal_5fdfa2d55329d.pdfIn PDF document text
    • https://mawebexakonu.weebly.com/uploads/1/3/4/3/134390129/wasar_jigixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5fe0af1c910a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5fd8c0f3bd852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_6027200612739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_6020026f89761.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://legatuwaw.epizy.com/4-_h_cloverbud_coloring_sheets.pdfIn PDF document text
    • http://jedenibiripo.epizy.com/vpn_gateway_azure_terraform.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/mebasux.pdfIn PDF document text
    • http://mirepili.epizy.com/fun_5th_grade_math_coloring_worksheets.pdfIn PDF document text
    • http://buwebone.epizy.com/miya_bhai_song_pagalworld_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/blackberry_keyone_update_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/deganiwogarakikexir.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_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 5412 bytes
SHA-256: 5101381b68e3694fc371c4490b1ef8ab3c9b223a61cea110eadaafea6fd37bb5
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 10864 bytes
SHA-256: db955b88196d530800ce6179067652016c79482aab85eaadc62edb7b74d002c9

Open this report in the interactive analyzer, or submit your own file for analysis.