Malicious PDF — malware analysis report

Static analysis result for SHA-256 8315e69f2769c544…

MALICIOUS

PDF

76.7 KB Created: 2021-02-23 05:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ba982df2ed35f11ad95c0521bc267782 SHA-1: f5965e7827d82b708e82cdaad9ad9a82d4d1293b SHA-256: 8315e69f2769c544991ae7a485e42134ecfb13e7bfa06a01d2d0afe7375c829e
244 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and embedded links strongly suggest a malicious intent to redirect users to harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yafferge.ru/strik?utm_term=can%2527t+connect+to+swann+dvr+remotely In PDF document text
    • https://cdn.sqhk.co/rigizisojix/hh1jigh/painting_with_a_twist_san_antonio_riverwalk.pdfIn PDF document text
    • http://3-bureaureport.info/gikekofonaninebige25mqy.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/1039232.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/jbiWKhc/94973336233.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/gCjf9uv/70789646259.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/wigires2oz9.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/biegjjf/gojelivedosetaxeki.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/bApD0Pl/sunigo.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/igBgUF3/sword_coast_soundscapes_download.pdfIn PDF document text
    • http://mydenverneighborhoods.com/human_warfare_recordso38h2.pdfIn PDF document text
    • http://rodina38.ru/appraisal_letter_format_to_boss1dhnf.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/aY1Qgig/xezodutiluxunumuvej.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/xesigeze/ruby_vs_python_performance_benchmark.pdfIn PDF document text
    • http://jilutuve.rf.gd/microscope_labeling_lab_answers.pdfIn PDF document text
    • http://nosorozu.epizy.com/sainik_school_balachadi_online_form.pdfIn PDF document text
    • http://safamulidapi.epizy.com/argumentative_essay_format.pdfIn PDF document text
    • http://wipapirub.epizy.com/52016239755.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_off0000ed19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED19 5280 bytes
SHA-256: a797794aa6c17f9e9e7a725e623b96a07f6ed8a9f7063d5e9f9d3695765d03af
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 11304 bytes
SHA-256: fdda34c576b76821dc4260b5fd394f73f8d9822e82f69f934d825d7ee2ad4a2a

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