Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb076c045294634…

MALICIOUS

PDF

73.1 KB Created: 2021-04-29 22:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0235267f1e8381ac0e1338ca3f9c9b2e SHA-1: 55025287abe0e876d5961ffb1ddf3d83ffa78c70 SHA-256: 7eb076c045294634ea07e08d4f9ffcf776a105c7b56ea236e39bd35112db4a7c
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 0.9996

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://dafemum.ru/strik?utm_term=which+act+book+is+the+best PDF link annotation
    • http://uscarins.info/kilagasaqafx0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_601298c1dd74e.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/suwixezonimijaka.pdfIn PDF document text
    • http://accueilcmb.com/melupujulo9p2pp.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/xasabukovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_605b9f47efb2b.pdfIn PDF document text
    • http://ledimpress.biz/89119137538mp1g7.pdfIn PDF document text
    • http://vesixadaw.22web.org/ludugoje.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/sapuma.pdfIn PDF document text
    • http://copytoshka.ru/nunevomifajuwolavedtk6cp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_600c03c92b474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_6037bce3bb1fd.pdfIn PDF document text
    • http://onlyforyou.space/what_is_a_mega_neon_pet_worth_in_adopt_meamzci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_605f6f86574e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/python_2.7_reverse_range.pdfIn PDF document text
    • http://tajafex.rf.gd/exercicio_balanceamento_quimico.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_b6e3a78ee26a4f43b3f99cba3be82500.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejeseja/donagebovabexuxepinivega.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_f5738c8f9d4d4614911930e71e25b09b.pdf?index=trueIn PDF document text
    • http://jagazuzigi.epizy.com/49690293765.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/substitution_method_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/pudexarozofamak.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_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 4976 bytes
SHA-256: 6a3fe654654d7e9407f1cf3920747583d4b4c9f2a2613ef5f717992b0032f71e
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 10776 bytes
SHA-256: a0dad7cc6f4cf62cf26067a12de440309ccdb14814ded2d91110faee0e89a560

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