Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e89dba35d27932…

MALICIOUS

PDF

77.1 KB Created: 2021-04-06 16:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 38b4aadfd13f966bdfb7bfb0b39c9c5a SHA-1: 568baf6679e46648643a95fa6a7847b7e72e2bcd SHA-256: e2e89dba35d279324e4435fb88d1fd8dfa2a1334546ff1b7d2e75e19fdd98c17
126 Risk Score

Malware Insights

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

The sample was classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically identified as part of a link farm on disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

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://vilenefex.ru/award?keyword=cessna+ttx+poh+pdf PDF link annotation
    • http://jimurizo.22web.org/fixorubagidajujufiwovapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475196/normal_5fe5b0d4f303b.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/binuremokolese-tubupukik-morujape-xuraraza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_6048420d125ba.pdfIn PDF document text
    • http://gunonoxuketevel.22web.org/etat_de_rapprochement_bancaire_cours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_6064fc322f0fe.pdfIn PDF document text
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/rabofimokire.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/6166431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_603f13a2a84fe.pdfIn PDF document text
    • https://nedugebev.weebly.com/uploads/1/3/4/6/134602354/e2946abe85b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408713/normal_5feb0ef1dcc04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450430/normal_603e2226051a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_6003302d07dd8.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/xasanidinogiximanal.pdfIn PDF document text
    • http://jufawet.iblogger.org/posusirulovunejotap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satonavuka.rf.gd/music_sheets_app_android.pdfIn PDF document text
    • http://bodagoge.epizy.com/bae_platforms_services.pdfIn PDF document text
    • http://vujulazi.epizy.com/9417045663.pdfIn PDF document text
    • http://jilevatawew.epizy.com/zojesiripujefowodumopa.pdfIn PDF document text
    • http://rewezaxow.epizy.com/solving_equation_word_problems_worksheet.pdfIn PDF document text
    • http://pavepeber.rf.gd/mojalusi.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_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 4976 bytes
SHA-256: 519d15dc3ef87f73cbb99a8821be8d9224da6e58ff8a7a7130263c6f6809425d
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11592 bytes
SHA-256: a0f47f91f8014058ea1b7efa77d44768b9a96a23e62284324f37fc38757c16af

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