Malicious PDF — malware analysis report

Static analysis result for SHA-256 100e8904a7117a51…

MALICIOUS

PDF

84.7 KB Created: 2021-04-03 05:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 676f0adfa4604cc50215739c4449d5b8 SHA-1: baf2d15ecb17b35be3ef6ef39205ea43c676878e SHA-256: 100e8904a7117a510ef1633a0c1a2d860b115f6dc50754edd8115223c2b6ed90
126 Risk Score

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-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://xezojetit.ru/strik?utm_term=quran+in+arabic+and+english+pdf+free+download PDF link annotation
    • http://vobajujabu.mywebcommunity.org/familia_asteraceae_en_mexico.pdfIn PDF document text
    • http://nozafonavuf.iblogger.org/chillar_party_full_movie_free_480p.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/training_sum_product_networks.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/8799971.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/dekotu.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/kibajed.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/autumn_leaves_sheet_music_piano.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/bepukuba/tavuvumosemagotiduxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/how_do_vacuum_tube_computers_work.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/lenuwejotajatemebesegug.pdfIn PDF document text
    • https://e4c06157-4c4c-4c30-848d-1ce07482e123.filesusr.com/ugd/99e070_29c845f66e2543e2a1a11ce24fd694d3.pdf?index=trueIn PDF document text
    • http://wirijabi.rf.gd/81711831688.pdfIn PDF document text
    • http://venakato.epizy.com/52500141367.pdfIn PDF document text
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_1bed34809c3c4a088eae691045b492cf.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_f918ff6252014e0da88d3547526fd3bd.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_e2446231d7e24ec0a465301533749060.pdf?index=trueIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_8ad34d504d4c41f2baec4a921c0d2863.pdf?index=trueIn PDF document text
    • http://likewiwojuxus.atwebpages.com/mla_citation_8th_edition.pdfIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_551dd3bd967d48e09197642b0743ffc9.pdf?index=trueIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_180e881af705475a8e5eee53348c7009.pdf?index=trueIn PDF document text
    • http://zasasopatadinu.epizy.com/71285688354.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 5712 bytes
SHA-256: 266c8ce64e2b1c5f7ac50e76de6340bcbac30fb59d6223f75fca6ab0abf9028b
font_01_sfnt_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 11044 bytes
SHA-256: f5307b142bdb05ea20b02ce17ba814dd6e43ddaf6a9a78b16b62349cef82997c
font_02_sfnt_off00011a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7E 22808 bytes
SHA-256: 842ac199fba9ce2c87be40965e2098d3b240acc19bddb1027330f755e1eec07d

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