Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e4ba8f0c6eeebd…

MALICIOUS

PDF

82.9 KB Created: 2021-03-28 16:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 40971c24221bd6b8297627e815238d2f SHA-1: 193cd46f38df996568064b4793cb8e6f92621197 SHA-256: a9e4ba8f0c6eeebd0dde36515ebcafca6e8a039e23d89946c3f91d429d29f575
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 0.9998

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://xezojetit.ru/strik?utm_term=half+blood+prince+why+did+snape+kill+dumbledore PDF link annotation
    • http://frontend-developer-azaynullin.site/bukupazurefuvimirawonwwl8.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/fonitebanone.pdfIn PDF document text
    • http://lowwsaw.xyz/which_penny_stock_is_good_to_buy_now_in_indiadgxpf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_6026932447294.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/widedileru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_60133e0c31d71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450353/normal_5fdcf86ce2fbc.pdfIn PDF document text
    • https://posenumu.weebly.com/uploads/1/3/0/7/130776111/nivenutin.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/xafevale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407664/normal_5ff797e7d1fbc.pdfIn PDF document text
    • http://lnstagram-office.com/la_esposa_que_ora_dia_28dg023.pdfIn PDF document text
    • http://repochka.site/all_star_wars_books_in_chronological_orderm65nr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_60224610474fb.pdfIn PDF document text
    • https://bodupakodekafas.weebly.com/uploads/1/3/2/6/132680796/dubinili.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/warapagefasovi/honda_shadow_vt1100c2_exhaust.pdfIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_5b073ce879cd47d9833789745e941616.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/internationalization_of_higher_education_in_india.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_cc5c4adac71a4da091f8ff7e81407c5f.pdf?index=trueIn PDF document text
    • http://bugenuvumap.atwebpages.com/molejisudilusitixamotasak.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/wenalemodu.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_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 5756 bytes
SHA-256: 07f7dcb9a56935052c303a1cba1d54d09b560c46156d7d6462241731d6dc470b
font_01_sfnt_off000116f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F8 10936 bytes
SHA-256: 437447e2821f78910ca9adb598c6e5ac46c4f1716cbe527ba88ec80c318d262b

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