Malicious PDF — malware analysis report

Static analysis result for SHA-256 080f448ee6426dee…

MALICIOUS

PDF

70.6 KB Created: 2021-02-21 13:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5bd1cbc9b99a9e3e2da579c8d1ef6c6e SHA-1: 832c8ce48eb051c54cd5e66657623ffa53fbdd19 SHA-256: 080f448ee6426deea042dc45284c90564d9b3c97cf4cfc13ee5f8613ad2ea9b6
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, masquerading as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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://jottigo.ru/123?utm_term=sadhguru+books+list+in+hindi PDF link annotation
    • http://moperala.iblogger.org/tofos.pdfIn PDF document text
    • http://rufisurerupu.iblogger.org/work_cite_mla_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5fdbe489afbab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_5feaeebe7b4fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405930/normal_5fddd6bb23eb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383807/normal_5fee8dbb12eab.pdfIn PDF document text
    • http://tevojagi.iblogger.org/wolatas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_6023e78a7407d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_601403e165de8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_5fe9ae959374b.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/gadumagabusodel/betinget_formattering_excel.pdfIn PDF document text
    • http://wofeginu.rf.gd/72066924058.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/fudusupewide.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/siwot.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/financial_function_in_excel.pdfIn PDF document text
    • http://wewodis.rf.gd/sample_commercial_proposal_template.pdfIn PDF document text
    • http://jowatazurusu.epizy.com/html_code_for_login_page.pdfIn PDF document text
    • http://polexunew.epizy.com/literal_equations_example_questions.pdfIn PDF document text
    • http://povuputuk.epizy.com/aws_cli_s3_multiple_files.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_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 5392 bytes
SHA-256: dc58b9f5b624215eb85b7576625fa31bec92a11243b2c78a728749e8b623cce1
font_01_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 10260 bytes
SHA-256: 0941006805fc482b367f16818211afb61a26a831b80a8883b9f11fbab8b95ee7

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