Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aeee6facb71f57c…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 09:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e4135456b34c7f2a544ba1552052b3b2 SHA-1: 0294d9a13f1b40b6e9263e0e31c14c9b4be1009d SHA-256: 9aeee6facb71f57cdfc9c426503cb06992d66b280e3daf564f52088528ff69d2
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to contain search-related terms, suggesting a phishing or scam lure. The ML classifier and ClamAV detection further support the malicious nature of this file.

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
  • 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 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://dafemum.ru/strik?utm_term=kenmore+front+load+washer+door+parts In PDF document text
    • http://marketeuro.pro/68426245418n5x7s.pdfIn PDF document text
    • http://kyhni.site/best_way_to_say_goodbye_quotesmdrdn.pdfIn PDF document text
    • http://topagut.iblogger.org/ihk_kln_berichtsheft.pdfIn PDF document text
    • https://talekadibozevo.weebly.com/uploads/1/3/5/3/135393667/6360723.pdfIn PDF document text
    • http://vash-komfort5.ru/jukilobugawanisatoggiugk.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/nukusugakid.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/pipiwetukilunavesemuwiv.pdfIn PDF document text
    • https://fuburufogukedez.weebly.com/uploads/1/3/0/7/130776130/bff4639c5daff.pdfIn PDF document text
    • http://winoorama.fun/36604365932yowp2.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/6613667.pdfIn PDF document text
    • http://dofegogojewipo.iblogger.org/gekobafivisunesura.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/7921900.pdfIn PDF document text
    • https://bogijaxik.weebly.com/uploads/1/3/2/6/132682919/1340688.pdfIn PDF document text
    • https://fowemofuf.weebly.com/uploads/1/3/1/3/131379389/4586019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pokanusoliviw.epizy.com/smartsheet_project_management_cost.pdfIn PDF document text
    • http://xuraxanab.epizy.com/lokijikimado.pdfIn PDF document text
    • http://gumenunusukuk.rf.gd/13813324216.pdfIn PDF document text
    • http://titetirif.epizy.com/junusujogepekota.pdfIn PDF document text
    • http://ridupokibi.epizy.com/dewalt_cordless_drill_brake_not_working.pdfIn PDF document text
    • http://zokazote.rf.gd/axis_bluechip_fund_portfolio.pdfIn PDF document text
    • http://vijanemafe.rf.gd/58653790295.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_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 5344 bytes
SHA-256: fc80749412a0d457b8395f179cff600bf744efe73f87ff374349f9e50a41cec3
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10504 bytes
SHA-256: 0ce3d00ffd4fc3bd3250e51f297e0a3633318577cd5e43a3ca7aca2de9247a42

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