Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc14d860e2a845a…

MALICIOUS

PDF

75.8 KB Created: 2021-03-01 18:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1a0718071d5071027efaa62737903ca9 SHA-1: 6acfbd88b713216e99b376a8aba2d4399b523b33 SHA-256: adc14d860e2a845a5f15a9474796fb3525bfc40a4cb72cd3e3197af896a21656
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a significant number pointing to disposable hosting and redirectors, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URIs are indicative of a malicious document.

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 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.
  • 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://xajibur.ru/strik?utm_term=supersonic+40+inch+tv+reviews PDF link annotation
    • http://pasikufopubiwo.mypressonline.com/jetuk.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/94527942994.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/jands_vista_s3.pdfIn PDF document text
    • http://najefot.22web.org/gadadakazexoninipuxijugop.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/tax_rate_changes_for_2020.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/azure_devops_pipeline_yaml_template.pdfIn PDF document text
    • http://soldonlittleton.com/xigar7dquk.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/smart_goal_setting_worksheet_for_high_school_students.pdfIn PDF document text
    • http://fredo.run/2240917254dpppd.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/13314193896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rafaturewixivan.epizy.com/65259697786.pdfIn PDF document text
    • http://wififeju.atwebpages.com/digital_signal_processing_lab_manual_vtu.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/what_to_a_slave_is_the_fourth_of_july_speech.pdfIn PDF document text
    • http://valogaberel.rf.gd/vodusebigizubozusox.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/rifixazonorajexer.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_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 5264 bytes
SHA-256: 478742810083835a0d9e3d3bee897e87c08f1d7f50b408d2e72cb056fb335927
font_01_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 10672 bytes
SHA-256: 963ace5a54cb9b0ce2230cfad66cbc006332650525369f9bb65b79eb3e67f331