Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01c5fba74a8da9d…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 11:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 39bd70913eb5ef040364bc626f4e0e29 SHA-1: 0a0b78f9390437bbfcc0cb1eabe9e6d74ce0f6bd SHA-256: a01c5fba74a8da9d7cdfe4fc8859f2faa837af04e6307476146612c79dcab6cd
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=ryobi+battery+warranty+australia In PDF document text
    • https://cdn.sqhk.co/jagojixego/dggygdF/saxanose.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/V2giidp/56523906876.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/wiahdhi/36043128674.pdfIn PDF document text
    • http://brumbum6.xyz/81805859964geq11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_6018d0e4a4a53.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/954c29d960e.pdfIn PDF document text
    • https://vejilete.weebly.com/uploads/1/3/5/3/135312445/kajosaxuk-buxagulorojo.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/Cjde6Y5/country_music_hits_70s_80s.pdfIn PDF document text
    • http://purpless.vip/interrogative_adjectives_worksheet_answers4yhgs.pdfIn PDF document text
    • http://cmbespaceclient.xyz/live_action_mario_kart_race_houston08qdd.pdfIn PDF document text
    • http://xplaintome.ru/primaris_lieutenant_zakariah_datasheetd6zli.pdfIn PDF document text
    • http://gutprod.xyz/hiatal_hernia_adalahmqh0a.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/gohhjHA/new_york_city_fc_soccer_score.pdfIn PDF document text
    • http://neyroskakalka.site/gedilubisibuzikaozkdc.pdfIn PDF document text
    • http://ourfanz.com/apple_music_on_iphone_11lj0yy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 5020 bytes
SHA-256: 8756c3cf75bb43388939197f97fafa1d0e29863370b7fa80da7df42d3b101617
font_01_sfnt_off0000f33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 10396 bytes
SHA-256: 01c5f866f10fdcf55c3e4ee0735ad7de715b1405899b406c82d631c974bc6a0d

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