Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43c154663a4854d…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 21:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1dca6a03f91c0dd29d1c2c90f39cfc23 SHA-1: bb21c4b2e224fdbebcfad295828967b60054981c SHA-256: c43c154663a4854dc443cd9f8e58032179b6a06171075e1498d9e0898e5d22c0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and suspicious-looking filenames, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wb?keyword=conflict%20resolution%20strategies%20ppt PDF link annotation
    • http://loduwij.scienceontheweb.net/number_theory_topics.pdfIn PDF document text
    • http://instapresent.site/viral_tiktok_starbucks_drinks_caramel3ssmp.pdfIn PDF document text
    • http://sushibara.net/my_cloud_local_login_urlpl4fa.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/buzokibusatewujoku.pdfIn PDF document text
    • http://tihefers.online/average_salary_aircraft_maintenance_engineer_australiagvvr0.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/47387404404qmoo6.pdfIn PDF document text
    • http://prizinsta24.online/seismic_reflection_processingflfth.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/kaxap.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/gupawupigawono/application_garden_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/borbaad_movie_link.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/bumigidepax.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/java_file_using_ftp.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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 5088 bytes
SHA-256: b4ba6e4721095dfd75c42401add01136cf0d5f832a954837ddcc22c185ccfcd9
font_01_sfnt_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 10336 bytes
SHA-256: 77e3f2e50637a7fabbd990596890b04e98313f7f6f7a011491901ad52c5eb1de

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