Malicious PDF — malware analysis report

Static analysis result for SHA-256 df30d0de717ceba5…

MALICIOUS

PDF

78.5 KB Created: 2021-03-08 22:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: be01e2aaddaeaf0d9f138343d195bf88 SHA-1: 9115713f8e2cea9c7012fc3bcf58ba69c0a9280c SHA-256: df30d0de717ceba57ac34cea9694ce4e435297dfc44cf7e823e10825c08073c4
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/award?keyword=aneurisma+de+aorta+pdf+2020 PDF link annotation
    • https://nojefawagalubab.weebly.com/uploads/1/3/4/2/134266261/ganogadu_pakilemuresa_xafokufe_sivuluberetivu.pdfIn PDF document text
    • http://itsnat.space/5281416691hxv0x.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/jzgg2if/92135700164.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/f1Amtgc/pitudezijifefije.pdfIn PDF document text
    • http://apsmall.space/kenmore_80_series_washer_weightizssy.pdfIn PDF document text
    • http://mirror-x.org/19644012021q67xp.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/dsi_revenus_2018_viergeipzwl.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/hj17die/91649240133.pdfIn PDF document text
    • http://ridunculus.com/ninja_air_fryer_reviews_amazon9o0tc.pdfIn PDF document text
    • https://xisagoruno.weebly.com/uploads/1/3/5/3/135332800/janoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/Yo8XiiQ/41645811612.pdfIn PDF document text
    • https://poxemitiwafu.weebly.com/uploads/1/3/1/8/131871555/58e81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_5e9584e38ee9483491139f503bed00ec.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_9a683aeb9357480cb293cb70c6501d18.pdf?index=trueIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_45891a65da2d4c2e958125669e68e445.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_73048f9bc344438683b1e4cb6ccb87d1.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_8bd91f83dc0849bc9037073c9cfc7d5a.pdf?index=trueIn 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_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 5416 bytes
SHA-256: c54124231f2a77c5146af850ca4041f9035302997b7ae5ee10c7242a8466cfe3
font_01_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 10792 bytes
SHA-256: 95d1884fa4f8f4bc35b1c09c986b94ea56cafd1d02359b728ee57ba1fc295201

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