Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cd10f79ddf71e0…

MALICIOUS

PDF

88.1 KB Created: 2021-05-03 03:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 079d396617fdf8097904e2548c126920 SHA-1: df6b2430077df3f3e95907d64162883625e4ed28 SHA-256: f7cd10f79ddf71e006b76975ae2d0167edb55e64e5b4bd7830e9e9aadeb8161b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'seumenha.ru' and using a 'gopro' search term, suggesting a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links on disposable hosting, further supporting a malicious intent. Although no scripts were extracted, the overall structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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/strik?utm_term=gopro+hero4+silver+vs+black PDF link annotation
    • http://sofarabexuki.iblogger.org/fezakagizezubob.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/33609667290.pdfIn PDF document text
    • http://wumokejo.iblogger.org/what_is_a_quote_sandwich_examples.pdfIn PDF document text
    • http://wizudaneku.iblogger.org/manutudabatatelafepoji.pdfIn PDF document text
    • http://dithetsen.xyz/torasobasixibo7cjsf.pdfIn PDF document text
    • http://auto-fishing-rods1.club/kids_math_videosf4u4d.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/how_to_speak_mandalorian.pdfIn PDF document text
    • http://wide-do.top/lubexepigoru50t1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejufutaz.onlinewebshop.net/mr_coffee_cafe_barista_cleaning_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b51e356-cc68-4cce-a886-1d444ea1469a/imovie_trailer_tutorial_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3cabfa4-8bbe-4595-bbed-2d15a94c0073/gifetag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63731c4-f8e6-4c84-a664-bda8a2a6f9e6/42069811088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec465af-6aa7-4056-938e-936345bf5d08/nuxikerefopisegev.pdfIn PDF document text
    • http://nidolivudazos.rf.gd/pastest_mrcs_free_download.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/advanced_excel_tutorialspoint.pdfIn PDF document text
    • http://vedagavizevuwu.rf.gd/active_passive_rules_chart_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e43ee9-73cb-4924-8932-d5ff0610cd30/96742268286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3090a0-f47f-4b27-ad52-6d057a7270fe/2013_dodge_avenger_2.4_serpentine_belt_diagram.pdfIn PDF document text
    • http://dinilemave.epizy.com/what_does_delay_mean_on_a_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8722d08-5a1f-4ed5-aa71-06c39c012c3e/wowojuxosapubiteno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893ac62e-286a-4d16-bdba-508e64af0bc4/korufokitofinuvigotewali.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/alligation_method_pharmacy_calculations.pdfIn PDF document text
    • http://titugol.atwebpages.com/critical_theory_today_chapter_1_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8377daf1-4c4c-4bc6-b77a-f76da76fa1cc/understanding_pathophysiology_exam_1_quizlet.pdfIn PDF document text
    • http://fexajorijoworas.epizy.com/16305468657.pdfIn PDF document text
    • http://sixanuramusasit.epizy.com/53821101785.pdfIn PDF document text
    • http://tafekeremo.epizy.com/ofi_carlyle_private_credit_fund.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_off00011b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7D 5404 bytes
SHA-256: 78d7d905e13a523f19c53b037ea81a0bf489547d67eddc8e290078fde0491290
font_01_sfnt_off00012de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 10808 bytes
SHA-256: 5dfc7cf78023038a328203139df65b08054f000a01c9cf199d9de253c0265035