Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d53d1a207ebd9a…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 23:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8a12f7f3462f7fe24b9d8082a987b350 SHA-1: 5eee9095934e5fe8755384a7e670924740de9642 SHA-256: f6d53d1a207ebd9af71a39b681922b68a2943798722e8c4aca815782335f41ec
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'seumenha.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=the+principal+at+crest+middle+school PDF link annotation
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/fokisakos.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/ziwexevu-laxene-vaput.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/683c7704967.pdfIn PDF document text
    • http://eduha.online/35906827795rboma.pdfIn PDF document text
    • http://otomail.business/dovezakogukudakuvisojezt7bk.pdfIn PDF document text
    • http://copyright-supporthelp.com/callapp_premium_cracked_apkhbnfk.pdfIn PDF document text
    • http://xogiraj.iblogger.org/63511227618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_6011b4b37e048.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/nomesil.pdfIn PDF document text
    • http://xrootunited.com/auction_house_appleton_wiqzphr.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/nuduxemizete-sasidoramozoka-zosuvit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5fd7b3702415d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_6007d4fae9a3c.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/gipejenowifaj.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/nonipesikiri/ubuntu_kernel_update_utility.pdfIn PDF document text
    • http://nozuwodapa.epizy.com/kagodoto.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/beatport_pro_windows.pdfIn PDF document text
    • http://samanoniminowut.epizy.com/somokefofix.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/puderalobipazademevobolax.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/59938176573.pdfIn PDF document text
    • http://xigesema.epizy.com/mewijipiteker.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_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 5260 bytes
SHA-256: 737e088183a471fde5778dcea152d39a9a2de06119ad1529660ddb1546814eb1
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10356 bytes
SHA-256: e4a46c796fb7186fd20b403d99f5b403ceef11b7c936f1895a51f79593b833dc

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