Malicious PDF — malware analysis report

Static analysis result for SHA-256 6934470df2d0f0d5…

MALICIOUS

PDF

91.6 KB Created: 2021-03-17 04:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a08322ce3eb15d4b5fe8ef9fdc369ec5 SHA-1: bad0ba3dfc754e30866da5814c13421017c32091 SHA-256: 6934470df2d0f0d5d1a29fe6be3a1c9e66ec589c949445d363bbb439371990a3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a book search, likely intended to trick users into visiting the malicious URL.

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://dugedepap.ru/award?keyword=capitalism+and+slavery+williams+pdf PDF link annotation
    • http://fesurowejo.mywebcommunity.org/9099560873.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/angaraka_runa_vimochana_stotram_in_telugu.pdfIn PDF document text
    • http://creditscorecard.info/zizanalalape28zu5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474176/normal_603b611508a97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_5fdd6904c10c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_604654b73c867.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/pradhan_mantri_awas_yojana_2020_application_form_in_marathi.pdfIn PDF document text
    • http://remont-pc.website/hicksville_schools_report_cardb7u6u.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/foxojam6gc3p.pdfIn PDF document text
    • http://xomaraj.iblogger.org/lusejofozudarelaner.pdfIn PDF document text
    • http://bolagafub.iblogger.org/yield_curve_risk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/32708299413.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/illustrated_russian_grammar_by_gotta_tsvetkov.pdfIn PDF document text
    • http://joratunezawaxa.epizy.com/pilegasotenowobavuw.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/can_i_use_my_tracfone_as_a_mobile_hotspot.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/osaka_railway_map.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/manawubizokaboburijub.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/milukivudeg.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/logical_positivism_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/beyond_the_wall_game_of_thrones.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/data_analytics_using_open_source_tools.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_off00012789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12789 5348 bytes
SHA-256: 9363baad566fe5f956ceb9d1eddc00c2164840c40df6766d3c4609ccf58e6696
font_01_sfnt_off000139b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B8 11512 bytes
SHA-256: bc00e7151657da70d82bdd56e544c930b348c804c5efc130f4d661d9df021ab3

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