Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e7b82c504fab11…

MALICIOUS

PDF

75.1 KB Created: 2021-03-06 09:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ad3aa8788e050c2c5b96841dc4f852b3 SHA-1: e85d0abb7ccead631dc007b9946dff882543b79e SHA-256: 99e7b82c504fab11e914f4973f4d8b13afdca4873ecc6fbd6216927d9da7e6c0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external URLs, many of which point to disposable hosting and appear to be part of a link farm designed to distribute malicious content. The presence of embedded URLs and the overall structure suggest an attempt to trick users into downloading further malicious payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=japji+sahib+pdf+download+sikhnet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403283/normal_603eb5f476655.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/xgfiUhf/76785669266.pdfIn PDF document text
    • http://idealica-uficiale.website/2722848444ntlm6.pdfIn PDF document text
    • http://circleshtang.xyz/toyota_verso_service_manualzuvxv.pdfIn PDF document text
    • http://kugitipozad.22web.org/97838314439.pdfIn PDF document text
    • http://prequester.online/cuantos_pactos_hizo_dios_con_el_hombre_en_la_bibliaj0h1k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_603fd068324ab.pdfIn PDF document text
    • http://lasns.fun/64959742856zrh58.pdfIn PDF document text
    • http://rubka.space/format_sd_card_ubuntu_ext4z05fp.pdfIn PDF document text
    • http://gradstroy.su/50697372784tii3v.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/3hcgOig/266277301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_6041abcea6e56.pdfIn PDF document text
    • http://basiditdcf.space/samsung_m2880fw_printer_driver_downloadia4ro.pdfIn PDF document text
    • http://ontrade.top/geverixeguxapivv70h.pdfIn PDF document text
    • http://getyourscore.info/shia_labeouf_no_transformers_4f4wqk.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/igifHgd/70844730827.pdfIn PDF document text
    • http://forpost-electrica.ru/28646525781qbitw.pdfIn PDF document text
    • http://ledy66.net/92737588048jdr7i.pdfIn PDF document text
    • http://idealslim-ordina.site/jukatawopaxigela7om22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogabofeki.epizy.com/janitrol_furnace_parts_diagram.pdfIn PDF document text
    • http://pumovumibabir.epizy.com/loose_lay_vinyl_sheet_flooring_reviews.pdfIn PDF document text
    • http://rewifavad.epizy.com/balloon_telugu_full_movie_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD402 5392 bytes
SHA-256: 7973f75ee4a52610c0b6385b57e9fe67ef1a99f15ae24c48b816cbe24342c4e0
font_01_sfnt_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 9736 bytes
SHA-256: a8cd9e7974bfc3aac1a600b1c5f631533c72fb9e4b5afa5a89b9a80a535e04b6
font_02_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 16172 bytes
SHA-256: b6a6ca5d1ececf9b8f85cf34f243a5152d852bd6c46ff1fd844468d100e5349c

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