Malicious PDF — malware analysis report

Static analysis result for SHA-256 e519ea54de6b8d87…

MALICIOUS

PDF

126.2 KB Created: 2021-03-15 16:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 701590f3635026582c1e44cefeabe9ac SHA-1: 1404f1d8af4cab0734cb8e482dbb69d77951a439 SHA-256: e519ea54de6b8d87c7c739b54dbd5935e3b37c9840263e3bee57c57400714267
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://ponafet.ru/aws?utm_term=complete+jewish+bible+david+stern PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374542/normal_603a3df764ba8.pdfIn PDF document text
    • https://cdn.sqhk.co/piwoputi/id9hjhe/48516647371.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/76867124893.pdfIn PDF document text
    • http://wide-mean.top/67122227662gam2y.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/how_do_i_simplify_a_ratio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_6023e546e075e.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/pamalomizidetadameza.pdfIn PDF document text
    • http://legionmone.xyz/74535365180nnaes.pdfIn PDF document text
    • http://babarogumo.iblogger.org/96170559771.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/gH6YJji/watirena.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/nidepufura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_6048d2ae133de.pdfIn PDF document text
    • http://technodom11.com/cosmic_girl_bass_tabcyjzf.pdfIn PDF document text
    • http://allostar.buzz/abc_iview_appcjgly.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/gujupozonudozako.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/simple_loan_contract_template.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hmJrjhX/pisaxixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_7341d510096a4a2f98161848297d3dab.pdf?index=trueIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_3c27072f29b44df98cd17fa0bb954def.pdf?index=trueIn PDF document text
    • http://pekafujojef.onlinewebshop.net/xirabosuvoviwaguwuwe.pdfIn PDF document text
    • http://bovuzigaratufob.rf.gd/bumilozijulesuwa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197AE 5472 bytes
SHA-256: 9c73630326e66793a9edee339b866a89946c8fe9bf1f9ea36ce502961ace4f28
font_01_sfnt_off0001aa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA2A 12172 bytes
SHA-256: b6a35128100971145048b1070bea5996ce6c0db73a5659c1876d750ee1135361
font_02_sfnt_off0001d375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D375 16452 bytes
SHA-256: d624bb4fba39b905590b858034b3fce346a20e934e67432a9bc56bc86adc124d

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