Malicious PDF — malware analysis report

Static analysis result for SHA-256 863d95700bd7f645…

MALICIOUS

PDF

71.8 KB Created: 2021-04-07 04:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7cdca71e0453ff5ba7ecb229c6e17e0e SHA-1: 5d2e94ccba622f6d421f48fc77c352493c46bfa1 SHA-256: 863d95700bd7f645c110ebb0f9247ca7402fba7a6551a67b42efabc8d0df5a51
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 0.9991

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://crophysi.ru/strik?utm_term=war+horse+harley+davidson+ocala+fl+34475 PDF link annotation
    • http://jolidulikan.scienceontheweb.net/colon_cancer_download.pdfIn PDF document text
    • http://pebogoginugi.iblogger.org/88396003570.pdfIn PDF document text
    • http://wobufiparezir.medianewsonline.com/anno_1404_building_layout.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/Iighbbp/ea_sports_ufc_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/Cjfljcx/beautiful_ringtones_for_android_free_download.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/nuwusalasobaneropaxaf.pdfIn PDF document text
    • http://guditoresuz.22web.org/rawijaninuxotugemu.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/6859013130.pdfIn PDF document text
    • http://pogadai.xyz/54014547181ou0zj.pdfIn PDF document text
    • http://voicebftyi.com/how_to_draw_an_isosceles_right_triangle_with_a_compassw51kn.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/ghGjddE/hocus_pocus_witch_characters.pdfIn PDF document text
    • http://nominasacra.ru/rofurelatisuijmc1.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/monififubivegikuvuzu.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/adhd_causes.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/burger_king_breakfast_hours_weekendg8hv7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muropij.epizy.com/19334687820.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/how_to_figure_out_outstanding_checks.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/basic_mechanical_engineering_concepts_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/14879140448.pdfIn PDF document text
    • http://kupikobu.epizy.com/4_pics_1_word_level_2606.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/doxuwizedegadagano.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/foxesikonaseraf.pdfIn PDF document text
    • http://zolefirujiwi.rf.gd/36187242713.pdfIn PDF document text
    • http://xasagode.myartsonline.com/lodonu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/angry_synonyms_word_whizzle_answers.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_off0000d7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E1 5740 bytes
SHA-256: 9be871650b282f0fe0469cfbadce3907eceb914c5c776db223a09d4f6c9aacf9
font_01_sfnt_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 11004 bytes
SHA-256: 8db03486e37945b7b0d18d3d6dbf8a839378ef096dba93b3582e18ea0fe2f89f

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