Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aeeb828d9e0f8a3…

MALICIOUS

PDF

79.3 KB Created: 2021-03-25 10:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 60f068f08a3b58cc1f9c277677148c98 SHA-1: a886dbcb78b3fdb2067af43835d4617e28cc7a5d SHA-256: 8aeeb828d9e0f8a39ed0f64de6e869656c55cd318b5fb9c644dd197774535110
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 URIs, with one pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The presence of multiple links on disposable hosting further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/123?utm_term=geekbrains+android+%25D0%25BE%25D1%2582%25D0%25B7%25D1%258B%25D0%25B2%25D1%258B PDF link annotation
    • http://disaxoxejegip.22web.org/how_to_speed_up_tp_link_powerline.pdfIn PDF document text
    • http://cafe-cok.ru/seigneur_coute_nous_seigneur_exauce_nous_partitionun1iz.pdfIn PDF document text
    • https://givurubikuz.weebly.com/uploads/1/3/1/4/131482907/9727645.pdfIn PDF document text
    • http://creampiepow.club/can_the_protagonist_be_evilzkgr0.pdfIn PDF document text
    • http://wanididezaj.getenjoyment.net/equilibrio_de_nash_ejemplos.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/what_stores_carry_american_journey_dog_food.pdfIn PDF document text
    • http://tesar-krd.ru/equivalente_de_100_gramos_a_mililitrosff0kg.pdfIn PDF document text
    • https://pevapulef.weebly.com/uploads/1/3/5/9/135979240/9578254.pdfIn PDF document text
    • https://feronodi.weebly.com/uploads/1/3/0/8/130813799/vanalapatijesu.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/kewofixabis.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/computer_science_jobs_salary_in_sri_lanka.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/blockchain_white_paper_satoshi.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/12567093935.pdfIn PDF document text
    • http://tokepefanoxite.22web.org/judujebinuvafanebasasuli.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/nanda_nursing_care_plan_for_upper_gastrointestinal_bleeding.pdfIn PDF document text
    • http://mazafaka69pussy.online/62059127691fexze.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/juzosuparagulet.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/47663027731.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futikuzita.onlinewebshop.net/dell_optiplex_760_specs_motherboard.pdfIn PDF document text
    • http://gedonisezif.epizy.com/2015_ski_doo_owners_manual.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/fibujilimeduzamaxejarirap.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/watchman_nee_books_collection.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/anomalies_du_liquide_amniotique.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_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 5588 bytes
SHA-256: cf4a2b94cf6464018a5d0ea66374fc86d150aef9698de0cab8fe9959451cf90c
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 15056 bytes
SHA-256: cd6453d7102d1f37d963bdca9d5e567cfbb046a300b8baa15b3b73c488ea90ea

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