Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab773192c8c75001…

MALICIOUS

PDF

82.5 KB Created: 2021-03-27 19:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8193646f0125f2587d9c8a9c92da0079 SHA-1: b957a73e9f9f87d94b0bf9b824adc5b54c615908 SHA-256: ab773192c8c7500128a8f152dba7cb8adba2a7c95a333235571485f90d6d646a
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs that likely lead to phishing sites or malware downloads, disguised under seemingly legitimate document titles. The presence of external URIs and link farm characteristics suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/award?keyword=traditional+cost+management+system+pdf PDF link annotation
    • http://nufivuzelikonax.getenjoyment.net/leadership_theories_journal_articles.pdfIn PDF document text
    • http://xasumemazekejo.scienceontheweb.net/29718078694.pdfIn PDF document text
    • http://gujatun.iblogger.org/update_address_on_ms_drivers_license.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5ff2c2c8bcd0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384320/normal_5fe33e52216df.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/jofilobunesawagasux.pdfIn PDF document text
    • http://raisinsapp.pro/how_to_reset_a_chrono_watch768hc.pdfIn PDF document text
    • http://idealica-tufficiale.website/hp_elitebook_8570p_i7_price7ubuh.pdfIn PDF document text
    • http://ourfanz.com/53692637147r8lfz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_602411f1ce7fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_60409e949e90c.pdfIn PDF document text
    • http://naturebiolog.space/pifugagesikilaz3uuu.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/malayala_manorama_weekly.pdfIn PDF document text
    • http://winoorama.fun/fapebiwukivf0oz.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/escuelas_psicologicas_cuadro_comparativo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupubobetob.epizy.com/72737875977.pdfIn PDF document text
    • http://xufoziminep.onlinewebshop.net/2714798269.pdfIn PDF document text
    • http://mokitipo.rf.gd/vegezio_de_re_militari.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/9271490695.pdfIn PDF document text
    • http://vegobojogaroju.rf.gd/nulanena.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/x_linked_agammaglobulinemia.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/felt_sheet_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/what_does_df_mean_on_my_split_system.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_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 5524 bytes
SHA-256: 4b3f74c8496b337effef69f2e989ea4d546a2eb3c3a56fdf5edae562ad668ff0
font_01_sfnt_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 10080 bytes
SHA-256: 361afb43cb377a945bd3d61a87b061663130b11a0a55e72ebc5ddd80dec6fd47

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