Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce0e63d324d22e9…

MALICIOUS

PDF

91.7 KB Created: 2021-03-06 15:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: df7935975d8e699dd674090fde870208 SHA-1: b24790a8f21d55289d8efa209483974e55fb5cd6 SHA-256: 4ce0e63d324d22e99423278219d5dc9c1d611d617128dcea5aef57aadf88cebd
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+take+the+front+off+a+maytag+bravos+mct+dryer In PDF document text
    • http://belplitka.ru/totomujuf2uqr.pdfIn PDF document text
    • http://robolab.one/arcgis_tutorial_for_beginnerszgl7y.pdfIn PDF document text
    • http://zuzudijibogojag.22web.org/lee_reloading_manual_2019.pdfIn PDF document text
    • http://medicalpracticementor.com/bikogozakuruwevesoga3vj6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5ff7f82a1a0c0.pdfIn PDF document text
    • http://homeolimp.com/what_is_the_purpose_of_sunspot_cyclec1jma.pdfIn PDF document text
    • http://exampl1214.com/gamedajexisagififewu1eiuj.pdfIn PDF document text
    • http://bnl-jobs.com/wallpapers_for_your_phone_free2jjko.pdfIn PDF document text
    • http://geniusenglish.space/lagrima_piano_manualiawnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_600bf1c0ed78c.pdfIn PDF document text
    • http://carbackseat.site/dagukajuvibimuwifisilo5ed7b.pdfIn PDF document text
    • http://unreguezff.rest/mopome6d3er.pdfIn PDF document text
    • http://wevotimojek.22web.org/gojusuropetujajukegesuzom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navamobatetipo.rf.gd/sepo_y_sapo_son_amigos.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/89999478967.pdfIn PDF document text
    • http://begodep.epizy.com/arduino_language_reference.pdfIn PDF document text
    • http://lefivox.epizy.com/back_exercises_for_back_pain.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/anomalias_dentales_de_numero.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/dekenikanigazijenipa.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/solar_system_worksheets_kindergarten.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/formal_email_format_o_level.pdfIn PDF document text
    • http://vekemifapujev.rf.gd/94978052423.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/the_wave_movie_2015.pdfIn PDF document text
    • http://budunasetixap.epizy.com/viruwibatilaja.pdfIn PDF document text
    • http://nuruvowaj.rf.gd/heathkit_sb-200_amplifier_for_sale.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_off00012688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12688 5824 bytes
SHA-256: 77a09d687170439564f9f7d06e2993e9a3c42b4c5f57aa93cdb9136da45691b6
font_01_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 11332 bytes
SHA-256: 187537b5f4f2f70f4d1cd3cd3bdd5093befe816201fcc9db4abf493fac0c131e

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