Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c00acb24283fe0a…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 23:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54f76a46ad3cc377d77024881a05d41d SHA-1: 5213dac99bed2b4ea21fccb835cbdbbfb774fc97 SHA-256: 2c00acb24283fe0af9fc1a9e37f69f0fe23b9a53456295291c37b1c49abee927
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=apology+for+poetry+analysis+pdf PDF link annotation
    • https://midunaso.weebly.com/uploads/1/3/4/6/134680252/638476.pdfIn PDF document text
    • https://bubixumijek.weebly.com/uploads/1/3/5/3/135397401/2245569.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/fojidugusata_zezalub.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/8744470.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/affairscloud_september_2020_weekly.pdfIn PDF document text
    • https://bigakajufejala.weebly.com/uploads/1/3/4/2/134265656/vijokanolosateti.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/zogivegov.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/rerinago/arrest_reports_sanford_nc.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_91fea6d4f2534470839603611aa3e917.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/70496886560.pdfIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_f9762de8e8d54355b4103ffb6438ef14.pdf?index=trueIn PDF document text
    • http://porojerosisogu.rf.gd/caracteristicas_de_los_cestodos.pdfIn PDF document text
    • http://besarod.rf.gd/20966303909.pdfIn PDF document text
    • http://woxesizefibugel.atwebpages.com/11945328149.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_33b9dab589604353a9c554dc20debe37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/bivizotafomotisiren.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/76334315021.pdfIn PDF document text
    • http://xulelaperimiku.epizy.com/73358378419.pdfIn PDF document text
    • http://roginopirut.epizy.com/97819146514.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 5300 bytes
SHA-256: 898870a2cf46048d427fcbbe7b3f238555af48bc6fe53c79bb68bdc4eb79625f
font_01_sfnt_off00010b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 10496 bytes
SHA-256: 9015d30493b4658fe8b571c01b40e8e94d978f8ee6169efe2afd96e5b5304351

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