Malicious PDF — malware analysis report

Static analysis result for SHA-256 8360f1563b407807…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 05:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0015dee890bc41a65a3edb0a52c4f3dd SHA-1: 7ef188dc4bd4c96f6c18208fcb1a37876cfff734 SHA-256: 8360f1563b407807ca381e183d2d765392455b1d64f48011092430576871607b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme, potentially leading to phishing or malware distribution sites. While no scripts were explicitly extracted, the presence of external URIs and the PDF structure itself are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jumiwimov.ru/award?keyword=human+body+systems+foldable+pdf PDF link annotation
    • https://zejuwotozago.weebly.com/uploads/1/3/4/6/134647352/guvafewawovilapunug.pdfIn PDF document text
    • https://jimuvidagonolab.weebly.com/uploads/1/3/1/6/131636746/1813701.pdfIn PDF document text
    • https://fezugewibopav.weebly.com/uploads/1/3/5/3/135346468/18d741ca93380.pdfIn PDF document text
    • https://wezefumuge.weebly.com/uploads/1/3/4/6/134614004/5826568.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/9395098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426816/normal_604aa91215df1.pdfIn PDF document text
    • https://fusikejasuk.weebly.com/uploads/1/3/0/8/130874124/e299cecfb31265.pdfIn PDF document text
    • http://fezanabuxa.22web.org/how_old_is_rafael_nadals_wife.pdfIn PDF document text
    • https://xigobiniliw.weebly.com/uploads/1/3/5/2/135298108/jobakutanig.pdfIn PDF document text
    • https://xudekumuf.weebly.com/uploads/1/3/2/6/132681038/6323834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_60544ade82d54.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/wolina/diet_for_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/nuburerebodiborazetob.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/alfabeto_coreano_hangul_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d0ea36-880f-4d61-9159-fbaa8b5a884d/canon_mx432_printer_ink_cartridge.pdfIn PDF document text
    • http://ramigavatezeten.epizy.com/8247272051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bc0a7e-aaf4-4cf2-9171-66215477e8b9/votubupirenumovezo.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/wudagovasadafolezuluzapi.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/33737565771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece7750d-8c21-46b0-8370-50798f71ea19/48307739153.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_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 5292 bytes
SHA-256: dee551116f7db7461519de33a7e2f2eef272e1e0d07ec9030293147dd0f49cec
font_01_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 10796 bytes
SHA-256: 4f9014cbb4bfc503b53bed80770fc62facfac4cbe405720638ada0404e262ca1

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