Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fe8333ca982713…

MALICIOUS

PDF

87.5 KB Created: 2021-03-31 12:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 92be85e953ffb4454b4933b52845dd21 SHA-1: 3c5549df451f7f69a1d31b9cb22593a1a4519adc SHA-256: 73fe8333ca982713375d5c6dc727c1b960ede382f32141f23d12f6b2809cefa0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/strik?utm_term=arbol+genealogico+de+abraham PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367275/normal_604af1ae3575d.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/pemop.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/wixuwupifedavuzabu.pdfIn PDF document text
    • http://kovezemunoropu.iblogger.org/75197949050.pdfIn PDF document text
    • http://tanubujurutemut.scienceontheweb.net/offset_printing_press_company_profile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_60122f781cf11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386597/normal_600776700ffb9.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/xekurawirotax.pdfIn PDF document text
    • http://lijonotogi.scienceontheweb.net/texto_expositivo_explicativo_e_argumentativo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://garapaf.epizy.com/60151608989.pdfIn PDF document text
    • http://lekugonaj.rf.gd/2393547145.pdfIn PDF document text
    • http://bobujosu.epizy.com/nilabefefivojujezurevola.pdfIn PDF document text
    • http://durenifujogax.myartsonline.com/35980037955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c5863e-857c-45b4-bef7-d244eb6c3feb/paint_dot_net_make_background_transparent.pdfIn PDF document text
    • http://tonorepunad.myartsonline.com/modowepogoviki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9186e96e-3207-45f7-9c1a-19198ad0cf2d/bijotafuji.pdfIn PDF document text
    • http://wepilujal.rf.gd/algebra_1_regents_june_2017_answers.pdfIn PDF document text
    • http://xaxotuk.epizy.com/96576143426.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012eea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12EEA 19780 bytes
SHA-256: 2019cf691bc63810748ca77d66a7c34607d44d3c3fff8b9a9759aeccf8e02ab4
font_00_sfnt_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 5304 bytes
SHA-256: 8cad8f2df508e441c6b7ce142543a1d833fcd47818a7c7c4c1ff62d3c5f3803f
font_01_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 13168 bytes
SHA-256: a4145845a185abc40d902f83516bc0ceb0e574bf22849bd90141f6f7b9827954

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