Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2926b1c3c2e61d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 10:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 21f651af11dad87d0105457ca2129d8d SHA-1: 243e64728a97bf6a69ad4e597d6872aa3cd58536 SHA-256: db2926b1c3c2e61dbdcd45bb4ab1612ed71ff8e29cc787a50d972456c8df63dc
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely instructs the user to install remote support tools, a common tactic for gaining unauthorized access. While no scripts were explicitly extracted, the presence of external URLs suggests a potential for downloading further malicious content or redirecting the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://jottigo.ru/award?keyword=how+to+make+bookmarks+open+in+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497095/normal_5fd82235250cb.pdfIn PDF document text
    • http://gopudumimipabol.mypressonline.com/berlin_tour_map.pdfIn PDF document text
    • http://geguxejap.22web.org/wasiwidaxaposuxume.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/black_and_decker_toaster_oven_specs.pdfIn PDF document text
    • https://wopurosifagup.weebly.com/uploads/1/3/5/3/135333772/026935357.pdfIn PDF document text
    • https://golotarati.weebly.com/uploads/1/3/1/8/131856611/5437925.pdfIn PDF document text
    • http://bossyonlinex.com/61285012590yexvq.pdfIn PDF document text
    • https://lesoloruvurer.weebly.com/uploads/1/3/6/0/136028926/dakafide.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/dizovewojiduwovutuwosifu.pdfIn PDF document text
    • http://sfr-webmail.com/zufoxuzomopudisofot7kktr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5fce2c3fbde0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405181/normal_5ffd9bd49e2ed.pdfIn PDF document text
    • http://tosety.xyz/lodopetojemojiwulurolodo66cep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495846/normal_603fc6b5eb723.pdfIn PDF document text
    • http://znohist.site/variance_of_binomial_distributionlyde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_6054c80f90f24.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/minabiwa/excel_2007_lookup_value_in_another_sheet.pdfIn PDF document text
    • http://boponewutizubi.rf.gd/english_literature_degree_online_india.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/email_outlook_templates_free.pdfIn PDF document text
    • http://lofoxos.epizy.com/jenaxoxobawe.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/sutasizodof.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/bogolebupof.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/anderlecht_former_players.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_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 5412 bytes
SHA-256: d8e0b8d47b121fa6ba2589d5270004a8b2a356d5dad4c858a29a11fd2eeac294
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 13328 bytes
SHA-256: 500f4bd74204539bb9cd9108dafa0a77d68ebeeb99ec144b8110d15f2fb568e6

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