Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f02380f1dab2df3…

MALICIOUS

PDF

105.3 KB Created: 2021-03-25 15:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 45d68b8a6f984daa161442285579975f SHA-1: cb6f1f271a1b686b1a376cf14db7654956023ab6 SHA-256: 9f02380f1dab2df3b46de88da5f585d031dd9ab223569aeed04bd43cb17f201a
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 a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of external URIs and the overall structure suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=mill+on+the+floss+restaurant+for+sale PDF link annotation
    • http://dojemop.mywebcommunity.org/65585444398.pdfIn PDF document text
    • http://fimewovoko.getenjoyment.net/administracion_de_pequeas_empresas_servulo_anzola_gratis.pdfIn PDF document text
    • http://datujizid.iblogger.org/40853307713.pdfIn PDF document text
    • http://reparefojig.iblogger.org/warokusasalenubirus.pdfIn PDF document text
    • http://dabiboniner.22web.org/how_to_manually_sort_categories_in_pivot_table.pdfIn PDF document text
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/gimakixiz.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/bradford_white_defender_hot_water_heater_manual.pdfIn PDF document text
    • https://vuzizakepavojen.weebly.com/uploads/1/3/1/4/131484090/1614316.pdfIn PDF document text
    • https://nugasoxitobaj.weebly.com/uploads/1/3/2/7/132710773/10b859b45e.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/xitolebujorazapodoro.pdfIn PDF document text
    • http://fudidudigas.iblogger.org/soundcraft_ui24r_app.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/lesolegapemut_wiraxulukef_zipelub_xorumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzexexaniledow.epizy.com/73832763025.pdfIn PDF document text
    • http://zapidijerazavot.epizy.com/accretionary_wedges_are_formed.pdfIn PDF document text
    • http://mopituvozu.epizy.com/83530462945.pdfIn PDF document text
    • http://wadarudi.epizy.com/zane_new_books_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6e95c5-0ae4-47cf-9528-d9d9948ff5e3/dosikokozowegow.pdfIn PDF document text
    • http://naburonip.myartsonline.com/2196109651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9919295-bfd3-412e-96c4-461f5961b1d4/gre_math_subject_test_scores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a02f8d-1244-441f-b23f-fcfaa2a8bbec/lozibupenaxug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b017d28b-5ab7-4eef-8ce2-bca9c9e184bb/21935679362.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_off00015cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF5 4860 bytes
SHA-256: 9c33dce0d143254c6cae3930656817f8f25a433aa3ae9a6e75c6b6a9e758648a
font_01_sfnt_off00016d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7E 12156 bytes
SHA-256: 084a4176c8995f61efc0a643ca5baa46dc9c14ca2f2fa8018ea727dd7516b4fb

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