Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f79d0679681a782…

MALICIOUS

PDF

72.1 KB Created: 2021-02-10 00:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 950e7aa8ccc161b43c966f6e7b8d2439 SHA-1: b6302403d37d8bff4b061d2a076cd16b5fb1b8fd SHA-256: 6f79d0679681a78273af0d9de360a3face775828bfa50a4e3a3647de20cfb5ac
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of external URIs and the link farm heuristic point towards a malicious redirection or download scheme.

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://leonvi.ru/123?utm_term=morgan+kay+beamer PDF link annotation
    • http://doordash.link/75122563411gm76h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_5fe52a01e5d54.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/demegamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_5fd797a9ba549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5fd807914b884.pdfIn PDF document text
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/1386f4.pdfIn PDF document text
    • http://deutschebank-meine.com/sujiporodudutugazelfl0wz.pdfIn PDF document text
    • http://goldstein.capital/beyblade_burst_rivals_game_guardianiy2og.pdfIn PDF document text
    • http://matteset-spon.space/survivalcraft_2_download_free_android2qpoi.pdfIn PDF document text
    • http://itanah.space/benoviloguni7lm.pdfIn PDF document text
    • http://detonic-de.website/retim_durumlar_modeliwhayq.pdfIn PDF document text
    • http://1ux.site/attahasa_kannada_full_hd_movieeq51a.pdfIn PDF document text
    • http://voiprormul.xyz/cbre_financial_report_2017vc8t0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601d18490f939.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/11109164966qkgfw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 5104 bytes
SHA-256: d35d1f2a81a878bbb43bd094df9ac135f6526853cf4a9d60ab324e2f531d6dfe
font_01_sfnt_off0000f04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 10568 bytes
SHA-256: 528f2e24b999562ce947386ed2d15057cd96f3d09d54818a3382720796fe4d71

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