Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b57dda0019959ad…

MALICIOUS

PDF

78.5 KB Created: 2021-04-12 08:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8fb4ba893b20ba616ea212be911f3f82 SHA-1: 1182a9c060d9d4a5986726347e37ef7128863458 SHA-256: 7b57dda0019959adbbb92c2456d90bcc80f13e5c695305d7c3e0cbbb013ca7c1
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 0.9992

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://maypoin.ru/strik?utm_term=what+is+the+beast+from+water+in+lord+of+flies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417827/normal_605401e054a1c.pdfIn PDF document text
    • http://vawuxipofuf.iblogger.org/bisomo.pdfIn PDF document text
    • http://lesedidunug.22web.org/intel_corporate_responsibility_report_2017.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/2524333047.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/aadhar_download_open_password.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://funseeds.site/malijik15yhf.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/safedakit.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/10402430111.pdfIn PDF document text
    • http://lotto-investclub.com/how_do_i_scan_from_my_brother_mfc_printer_to_my_computer09u15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_6054cf37b8554.pdfIn PDF document text
    • http://supanigavig.iblogger.org/vobodewezo.pdfIn PDF document text
    • http://lnstagramsupportlives.com/83213962757olazq.pdfIn PDF document text
    • http://elinekici.online/levis_womens_t_shirt_size_guide9tzol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipobemimojogot.rf.gd/adblock_plus_per_opera.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_9aefc48f97d54dbaaeee979ec41fdc37.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_f31630735cdf4103b92942bc7f645b8f.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_585bfecfbfb543119f54f23aa6793722.pdf?index=trueIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_ed341f1a7a754b3f9c2c33fea2a57062.pdf?index=trueIn PDF document text
    • http://rojanesifilagu.myartsonline.com/98868471037.pdfIn PDF document text
    • http://wefasonukot.epizy.com/camber_angle.pdfIn PDF document text
    • http://zadesejofugo.epizy.com/c_s_lewis_livros.pdfIn PDF document text
    • http://mimafesajasi.rf.gd/gogajigix.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_off0000ef49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF49 5392 bytes
SHA-256: 4a80b58525ba715d1e2d1e6df4116c360f2e53de48a3f44d9ff0de644a5fd7c1
font_01_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 12264 bytes
SHA-256: 799dd9da0e220a0611be48cf6be14b904ae019385b8e906da5aa3043299e2629

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