Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50829779224f0ff…

MALICIOUS

PDF

77.0 KB Created: 2021-03-02 21:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c45274cf148a009c16722b99b0a49a91 SHA-1: eb962935a50e7651ff52410b33f42ff22f546ed3 SHA-256: b50829779224f0ffd474cc14b21956d107534ad726108d72e2e1e95c5e42608a
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

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://mezovuduw.ru/award?keyword=orbit+b-hyve+6+station+indoor+%252F+outdoor+irrigation+controller+manual PDF link annotation
    • http://fasekafalig.scienceontheweb.net/pawirinukugamekofitabi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455876/normal_5fefd665ac984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_6003cbf95531c.pdfIn PDF document text
    • http://aslixan.com/how_to_calculate_inflation_adjusted_return_in_excelj0qnw.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/sony_str-k740p_service_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490950/normal_600090431f4e5.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/cuisinart_electric_fondue_set_power_cord.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/waravusuvobuboxezoxeta.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/cgdgcig/lexia_reading_core_5_level_13.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/yjyXTgf/rotepatasefigizesuzudef.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/jelonok.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/sewamos/85931205183.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_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 5904 bytes
SHA-256: cc2d3d87fcdc89aecbb8fce8cd0c7bac38981bdd97f0b46e2694b39105be25ff
font_01_sfnt_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 3852 bytes
SHA-256: 42a4ed14643b7158ae59b875bbc198a7b6d7f02bbd98b0ac9d129c7aee90e3a3
font_02_sfnt_off0000fff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 10600 bytes
SHA-256: 43437f14b86aec7896a95110b2524a80fa88c90b6db85332cd1fa930d830ef5b

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