Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05b684db4927f62…

MALICIOUS

PDF

77.4 KB Created: 2021-04-07 19:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d65015ff23b725b942e5c0c47ee0ee02 SHA-1: cfc678c1377175885ccfa5c589ee7d4e769dd3ec SHA-256: e05b684db4927f62422cacb4653e8d11961170523c27948bfeb4701d30c4503c
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL pointing to a suspicious domain ('xajibur.ru') that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=new+seeds+of+contemplation+thomas+merton+pdf PDF link annotation
    • http://biniwitovo.mywebcommunity.org/23795436983.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/bomekokujemubanojezi.pdfIn PDF document text
    • http://tubujefowabe.medianewsonline.com/fedex_us_airbill_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tupamesazadazop.rf.gd/simple_past_exercises_com_gabarito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f768ee-4d02-4157-9957-03933cd0b20a/the_hermetica_timothy_freke.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/video_helper_firefox_48.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/40381530012.pdfIn PDF document text
    • http://wumikexenuge.epizy.com/peavey_bandit_112_transtube_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e259545-fa5a-4d25-863f-e1245d71fcb6/papugimuwewakew.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/job_interview_questions_and_answers_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2da7600-67bc-4dc8-89f3-b844860b7bb2/timex_marathon_off_military_time.pdfIn PDF document text
    • http://mojozore.myartsonline.com/capteur_de_vitesse_de_rotation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2872d7-b586-48b1-aa58-fb8569cf42c8/swahili_dictionary_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/tnpsc_departmental_exam_may_2019_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33bbcc1-e9a8-4a01-aa49-e86f6efd5f56/el_sistema_endocrino_que_funcion_cumple.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/beautiful_kari_jobe_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e7c75b-8486-42d2-93d8-87e888c8d6f3/famajefotaz.pdfIn PDF document text
    • http://gudujezakolomu.onlinewebshop.net/lerilige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68903126-3c51-4674-aa71-a9254a3133ef/are_resistance_bands_good_for_seniors.pdfIn PDF document text
    • http://betitunusepa.epizy.com/72875784900.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_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 5456 bytes
SHA-256: 10e43e22d66cc135be13ba9268c3bb1a6527eb528f4117af365aaf3006ca8b06
font_01_sfnt_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 11028 bytes
SHA-256: 79073e6060443575cc30d40f4191b9a188a9c42236ecde337d9294eff66dc13a

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