Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbc6caa4e0ba66e…

MALICIOUS

PDF

65.4 KB Created: 2021-02-26 07:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ecddb970114b06e8e979b9273fb09486 SHA-1: 3bde36a73dd927b2db006d71fea813c8a8d465b0 SHA-256: 7dbc6caa4e0ba66e94b6b5fa5f67fc732bedb517f3103c54f41a608e17f584e3
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/wix?keyword=adding+and+subtracting+rational+expressions+worksheet+doc PDF link annotation
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/korije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_60277ba005183.pdfIn PDF document text
    • https://vagafanuwojuxiv.weebly.com/uploads/1/3/0/7/130776749/ae028e.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/ramutofaxes.pdfIn PDF document text
    • https://lewedizo.weebly.com/uploads/1/3/4/6/134610291/2099818.pdfIn PDF document text
    • https://totofogekof.weebly.com/uploads/1/3/5/3/135327731/tovibopeg.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/kuwerigawita.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/muvinu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeragapa.epizy.com/samapijalokinopewuvotiso.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/2166915168.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/62678394954.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_off0000c336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC336 5688 bytes
SHA-256: 4b4a606bd0f9f62f9138b06035794157987ed7167e9fb4b89cf2e0a2304442da
font_01_sfnt_off0000d69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69B 10052 bytes
SHA-256: 5af3814a2c7746a1fcce01ad98bd399281d167b72488fd943b369d4da1e4f396

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