Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b76da1686d646a…

MALICIOUS

PDF

74.2 KB Created: 2021-02-27 15:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f355d9fc2e79e51b124efe486d8539e0 SHA-1: 095c755081dfb699a246e99851d548aa3500f296 SHA-256: 19b76da1686d646ad76db6bddfebf1ba3c61afb8ba9f945b8bc328f9178e35be
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs further supports a tracking or redirection mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=construction+fire+safety+manager+jobs+nyc PDF link annotation
    • http://phrensy.co/cryptocurrency_trading_strategyno0jr.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/10341865046.pdfIn PDF document text
    • http://energytik.net/pretty_little_liars_book_set_1-16qcaga.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/pililil.pdfIn PDF document text
    • http://pornbustyvids.com/suppes_axiomatic_set_theoryardag.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/oculus_quest_adb_drivers3l4cu.pdfIn PDF document text
    • http://nout-prodat.site/dodigipozibgaleh.pdfIn PDF document text
    • http://ighelpcenter.xyz/xibujatazafibuvomojegadiz5dzh.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/valuation_se_dplacer_au_quotidienx1ksw.pdfIn PDF document text
    • http://lighterusb24.site/criminal_procedure_law_and_practice_10th_edition_freezljpt.pdfIn PDF document text
    • http://medgaj.com/pukiwovibutodoralle9qk.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/ejercicios_de_simetria_para_secundariaxv69s.pdfIn PDF document text
    • http://shopwithsale.website/bently_nevada_3300_xl_wiring_diagram5yyj2.pdfIn PDF document text
    • https://riladubo.weebly.com/uploads/1/3/4/6/134684868/1629915.pdfIn PDF document text
    • https://fugopezawisobib.weebly.com/uploads/1/3/1/3/131383650/7864dcfec765a2.pdfIn PDF document text
    • http://nesobaka7.xyz/how_do_i_determine_the_age_of_a_heil_furnacelfiev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widifusi.myartsonline.com/14146343390.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/waters_of_babylon_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/lasulupafif.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/24781638999.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/eukaryotic_cell_labeling_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/86074877570.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_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 5392 bytes
SHA-256: 0ad22c07071c1581841010f815c72e7a53e927cb2eefdeb1e8f03210a4d6ba74
font_01_sfnt_off0000f68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 10872 bytes
SHA-256: 230a3fe6cbc95a024aeb0b56ed406b46254efd80a842fbd3c5ab404308e25722

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