Malicious PDF — malware analysis report

Static analysis result for SHA-256 5974fb0d5bacd108…

MALICIOUS

PDF

76.6 KB Created: 2021-02-27 01:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ab4ac2b5858450e6cd68daca80596b6 SHA-1: 5f5a62c1a1aea0f55544a16c072a1ccb0ef27c27 SHA-256: 5974fb0d5bacd1084209e660b5a3c53c32b44e5168f0200599ae102f44fa5c48
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wb?keyword=printable%20food%20calorie%20counting%20chart PDF link annotation
    • http://100naturals.fun/smart-ups_1500_xlm_replacement_batteryh6hsr.pdfIn PDF document text
    • http://jumbochecker.com/paris_texas_zoning_mapuy840.pdfIn PDF document text
    • http://constructionhouse.info/93861631921fex8t.pdfIn PDF document text
    • http://dreabling.online/labidagoveso018if.pdfIn PDF document text
    • http://blaugrana.ru/23595917864b96k4.pdfIn PDF document text
    • http://gogumojaxufibid.22web.org/65672243674.pdfIn PDF document text
    • http://rankingcoach-apps.com/26950990483gbzi7.pdfIn PDF document text
    • http://paypallsecurity.com/48532543927mpp14.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/zepamutfbb.pdfIn PDF document text
    • http://fortuneo.biz/instalacion_de_gas_estacionario_precioy2qyx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pufaperimixalet.epizy.com/bodajotupefarebakosewiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/analytical_reasoning_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/comment_fusionner_2_foxit_reader.pdfIn PDF document text
    • http://fewetero.epizy.com/roland_spd_sx_not_turning_on.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/3-_4_equations_of_lines_practice_answers.pdfIn PDF document text
    • http://dexifuv.epizy.com/5380806687.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 5128 bytes
SHA-256: d817d1e679e9a7b838c8d74629d6d986a0b164d4bd2d7d7c91f7196a383108c2
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 10272 bytes
SHA-256: 601554c284c482edfdfcc1f1f58d1f02ed7dc104db07e60a70e4049bebe7d399
font_02_sfnt_off00011783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11783 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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