Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea175b408ba32a0…

MALICIOUS

PDF

88.5 KB Created: 2021-04-17 02:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9cffceda3ccaab90af0758b3972982b7 SHA-1: 24c0cefaa508c692d028633b78af9240e62b36e9 SHA-256: dea175b408ba32a0c4b33055367ce60ca8ab8f67e3fe731187b3c1fb22e48941
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 one specifically linked to a technical query about Whirlpool washers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit user curiosity and lead them to a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=how+to+put+whirlpool+washer+into+diagnostic+mode PDF link annotation
    • http://moxilekulina.getenjoyment.net/97926929711.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/pefosejoboxemejoko.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/hymes_the_ethnography_of_speaking.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/barbie_colouring_pages.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/tales_of_a_fourth_grade_nothing_reading_level.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/94949226117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levigorofelo.rf.gd/slavery_by_another_name_questions.pdfIn PDF document text
    • http://furalepoju.rf.gd/alimentacion_complementaria_minsa_peru.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/zazekaloxofibir.pdfIn PDF document text
    • http://xaxamudujuve.epizy.com/how_to_use_introverted_intuition.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/angle_of_repose_of_soil.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/wimipivalizudapimod.pdfIn PDF document text
    • http://rixaxapuroveto.rf.gd/most_important_full_forms_of_computer.pdfIn PDF document text
    • http://gomeriw.epizy.com/lidelanifififodulibosetuk.pdfIn PDF document text
    • http://wapolijo.epizy.com/bonafide_certificate_for_national_scholarship.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/jeketog.pdfIn PDF document text
    • http://sadamalaju.epizy.com/jaxiguvasanebiximijunatud.pdfIn PDF document text
    • http://rozafibadajowo.epizy.com/23889033951.pdfIn PDF document text
    • http://torumaxot.rf.gd/ant_face_mask_template.pdfIn PDF document text
    • http://vedisupekak.epizy.com/genunamis.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/68183211936.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/vipedawaginegawigiku.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 5540 bytes
SHA-256: c4cb0e35e9673726952034a1e51d921268962b8961f761eb8bc24f7d09264484
font_01_sfnt_off0001182b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 11400 bytes
SHA-256: 5f137963ba438cb57b689e6f2cdd90babb13d2377b09baf7efacc8179a2d5eb1
font_02_sfnt_off00013f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4D 16084 bytes
SHA-256: fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3

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