Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9847301bdb186f…

MALICIOUS

PDF

91.7 KB Created: 2021-04-08 06:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 024fedae834824c20162fbbdfdd52368 SHA-1: edf0de7123155b8d673dd1fbe60d22ecad7b792e SHA-256: 2d9847301bdb186f1f2905b1f9e4064fe7f5f3cbdd80e593ded364d4b169473b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'seumenha.ru', which is likely the primary malicious destination. The PDF's structure and embedded content suggest it functions as a link farm designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/wb?keyword=beren%20ile%20luthien%20film PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403117/normal_6014a3035343d.pdfIn PDF document text
    • http://electorat.org/nelson_grade_9_math_textbook_answersae89x.pdfIn PDF document text
    • http://svarka-aurora.online/billboard_top_100_year_end_2017vfctr.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/kiwukej.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/iI6ifji/59458798229.pdfIn PDF document text
    • https://cdn.sqhk.co/lajagika/xzgc7gf/chinese_drama_2019_romance_comedy.pdfIn PDF document text
    • http://lordtrans.ru/online_english_learning_classes_in_indiaanf4t.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/9stViiL/phone_number_tracker_app_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5fdd67dc9ecd5.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/truss_analysis_method_of_joints_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoziku/hjjOgfn/navy_warship_battle_3d_mod_apk_free_shopping.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/coleman_powermate_3000_generator_parts.pdfIn PDF document text
    • http://mattelipsticks.site/movistar_el_salvador_venta_de_celularesjfm3f.pdfIn PDF document text
    • http://pixell.store/nojijejowositataf1bbb.pdfIn PDF document text
    • http://lixidepobejoji.mypressonline.com/creative_writing_year_4.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/fbdd18fd-4c4f-4ab5-bead-fb33aea3b750/what_are_the_cup_sizes_called_at_starbucks.pdfIn PDF document text
    • http://pexofapu.myartsonline.com/surah_baqarah_translation_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2e308a-9f37-442e-ba9e-f617b705bb8c/sherlock_holmes_series_download_in_hindi_720p.pdfIn PDF document text
    • http://porumujowupof.epizy.com/happy_new_year_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85582037-07ca-4e9d-bbee-a70e3369c113/zuwukekepunerekofaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613dda11-ce88-413b-9873-b30b0bb2e0cc/wegevosixedewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee26e61d-591a-4595-9550-fa8e69d66124/57362161150.pdfIn PDF document text
    • http://rinexaxar.rf.gd/pearson_mymathlab_college_algebra_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_off00012aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 4668 bytes
SHA-256: 922db0ec2ccb4571715096d45f16039939f21d3924467330837694c39cfc2897
font_01_sfnt_off00013aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA3 12432 bytes
SHA-256: 7b6d5880670113ec3f11daaf6fdb67c96a7175a32f534d361509a40dd04c0e86

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