Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5e7e1cc017d46a…

MALICIOUS

PDF

76.0 KB Created: 2021-02-14 07:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1f27d5d8b1b7e7d34a753ea88e12d6fe SHA-1: e1737f889038b9e67ea3986ea4b8f60eda18af29 SHA-256: ea5e7e1cc017d46ab7e98e25b48fc943716d99318a29c9d52d65f70424bf9bc6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs, such as 'https://leonvi.ru/wix?keyword=the+wild+robot+escapes+pdf', are designed to redirect users to potentially malicious content. No scripts were extracted, but the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://leonvi.ru/wix?keyword=the+wild+robot+escapes+pdf PDF link annotation
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/temagesesufe.pdfIn PDF document text
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/rovuxuj-zevaponadageg.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/871182fcb6.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/zuxezixiwalinov.pdfIn PDF document text
    • https://woxamaxepid.weebly.com/uploads/1/3/0/7/130776503/6722751.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/217085d3a2305fa.pdfIn PDF document text
    • http://vatasefapulik.iblogger.org/84386776385.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/8409fa.pdfIn PDF document text
    • https://zezawimikosalef.weebly.com/uploads/1/3/5/3/135329884/9749731.pdfIn PDF document text
    • http://tujodugugejime.22web.org/sample_persuasive_essay_mla_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vanuragevexofe.rf.gd/learners_permit_study_guide_quizlet.pdfIn PDF document text
    • http://tasopawak.rf.gd/powerpoint_theme_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/abba_happy_new_year_satb.pdfIn PDF document text
    • http://gobudulofi.rf.gd/lizimeret.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA1 5108 bytes
SHA-256: dbb299886bb286327f4cde7eedaeb52b45c24acbe0847f163ba07ed7a14ec3af
font_01_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 10764 bytes
SHA-256: a4bf1f1878e1b8bd5b169b18be3ebe076da296afcdae19399702c5cf6222ee69
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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