Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ccd9d39f50164b…

MALICIOUS

PDF

72.7 KB Created: 2021-02-09 15:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 06d4a524d7f60e676f30ff148397c9c3 SHA-1: 9b673bd73cfbb483f265b903daa5254e64b0d42e SHA-256: 69ccd9d39f50164bebfa63fc58c8c41aa4b0d8a2939248fa8781f13e3b1688ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, many pointing to disposable hosting domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

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://druttle.ru/123?utm_term=como+hacer+un+marco+teorico PDF link annotation
    • http://rexapeduke.66ghz.com/14903170375.pdfIn PDF document text
    • http://infonewstravel.com/kasuxukowuxobixinw369.pdfIn PDF document text
    • http://cosmicgig.com/632201428714engl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fc5757104ae0.pdfIn PDF document text
    • http://xidotamasaw.22web.org/writing_linear_equations_using_two_points_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_6020993a40121.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/dovulavavo/fezewini.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/select_auto_submit_form.pdfIn PDF document text
    • http://lilufafuf.epizy.com/16705382878.pdfIn PDF document text
    • http://donixug.epizy.com/aruba_7200_mobility_controller_configuration_guide.pdfIn PDF document text
    • http://tivapatovike.epizy.com/student_reflective_learning_log_template.pdfIn PDF document text
    • http://suluzisose.rf.gd/answers_to_happy_birthday_wishes.pdfIn PDF document text
    • http://didosides.rf.gd/food_stamps_south_carolina_income_guidelines.pdfIn PDF document text
    • http://pavemamixazose.rf.gd/96011492917.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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 4736 bytes
SHA-256: 8c299139e6072dfb9cb781c6cd39f330072013c9250c3bae388f0d1012f7e4ae
font_01_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 11164 bytes
SHA-256: 706a009b7ceb0826faa79c980d3ff57d86947c6184e341c7f47e9b42174beabf

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