Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e2f274640f07d1…

MALICIOUS

PDF

74.0 KB Created: 2021-04-20 11:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42bdff39192f1c53a313bc576d8d63ae SHA-1: b36e34cedacdde605c3bf4825d5695046d7d504e SHA-256: 27e2f274640f07d15be4ad4b44327a859338f77d2999ff6a4bcd31c1f9e3d178
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=how+many+times+can+you+day+trade+on+webull PDF link annotation
    • https://cdn.sqhk.co/dasisogi/ie0jeij/biaya_beli_pulsa_lewat_m_banking_bca.pdfIn PDF document text
    • http://xemuzaxu.22web.org/xujurewano.pdfIn PDF document text
    • https://cdn.sqhk.co/namaboniki/ygemH4F/41500684113.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/hbAjj2d/42216044079.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/ggHjbii/tiwobebupipavepifopuju.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/icuhiPl/small_jungle_island_seed_minecraft_pe.pdfIn PDF document text
    • http://vigefiz.iblogger.org/jetav.pdfIn PDF document text
    • http://bopodimo.iblogger.org/bissell_little_green_proheat_pet_replacement_parts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced294b8-439d-4526-8df0-df3ab17be16e/how_to_program_jumbo_universal_remote_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4725c558-421b-4f97-8eb4-be427fa89b7c/a_supposedly_fun_thing_summary.pdfIn PDF document text
    • http://liziraparexobar.epizy.com/69285184993.pdfIn PDF document text
    • http://piwefijegiv.epizy.com/tagekijijapan.pdfIn PDF document text
    • http://sibubixusa.epizy.com/6616708835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7577139e-b1ce-4f6a-ac85-8391384e647c/sozaxipuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daf8969-7fd8-4141-a9ff-543a5995efcd/what_are_the_key_differences_between_bacteria_and_viruses.pdfIn PDF document text
    • http://bebalujoworaz.epizy.com/rajegetafifat.pdfIn PDF document text
    • http://dudakitulefuteg.rf.gd/john_lewis_leeds_store_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a642c46-84b2-403c-aada-7b9650030b30/what_does_the_prefix_mito_mean_in_biology.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_off0000e21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21B 5380 bytes
SHA-256: 1545ba1fe064a62e0d69aa37ecd2344eb302bab7641d5be34271950f80cdeb15
font_01_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 11272 bytes
SHA-256: 273ccd087785925b1781ef6a98e705eb3ed87bb1dfa779acbfa2ce735524adea

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