Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2fd68e68b981025…

MALICIOUS

PDF

69.6 KB Created: 2021-03-11 22:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a1cd6010292d91368ddde685666c1007 SHA-1: c14b7afdf7b16e1ed3de1d39d14c8885a3b9235e SHA-256: c2fd68e68b98102559529fddfceaa634e7bc9dbe2dc31f48a1d3195a8fd7de2d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a spearphishing attachment, likely intended to redirect users to malicious websites for further exploitation.

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://xezojetit.ru/award?keyword=cuaderno+de+ejercicios+de+los+cuatro+acuerdos+toltecas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423188/normal_60139cd0832b1.pdfIn PDF document text
    • http://lovechat24.club/kuxekavebumannweh.pdfIn PDF document text
    • http://bukejasinopa.22web.org/chronic_constipation_management_guidelines.pdfIn PDF document text
    • https://nirotagikul.weebly.com/uploads/1/3/5/9/135992947/vabuwisadudup_tonozasakisikap_zituwutajosakon.pdfIn PDF document text
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/6609667.pdfIn PDF document text
    • http://gunodopo.22web.org/rokajolojotemimaduxex.pdfIn PDF document text
    • http://citruss.space/the_door_in_the_wall_hg_wells_character_analysistqj28.pdfIn PDF document text
    • http://baby-slings.ru/translate_apple_juice_to_spanishcbq9a.pdfIn PDF document text
    • https://vosujesu.weebly.com/uploads/1/3/4/6/134646347/5871de9055e901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5ff2aef31d05f.pdfIn PDF document text
    • http://nemekarasika.iblogger.org/resume_template_free_word_malaysia.pdfIn PDF document text
    • http://edapog.online/behan_ka_pyar_na_ruthe_ringtonew9bh4.pdfIn PDF document text
    • http://doburepos.iblogger.org/information_about_school_foundation_day.pdfIn PDF document text
    • https://kajipeluvo.weebly.com/uploads/1/3/4/3/134318391/doluk.pdfIn PDF document text
    • https://zepudelewow.weebly.com/uploads/1/3/2/6/132682561/daditivorusixe.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/10bc6bce-153e-4774-bb91-a81c56bf24c9/41236258438.pdfIn PDF document text
    • http://mapegolirij.epizy.com/what_is_the_best_time_to_grow_tomatoes_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7bc810-eae2-43e8-a641-5ad0ad0d3205/fl_studio_mobile_download_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1f83ba-0abc-47d5-9d3e-8a537daaf770/mvc_interview_questions_for_experienced_professionals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094f4c89-da5d-4c33-bd1c-2b2fd50b816d/sewiguzagovetikisexufag.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_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 5132 bytes
SHA-256: 04a76c8257392c3af9be7de904162790cc3ba137b3165f2807a849b0a04e83f5
font_01_sfnt_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 11048 bytes
SHA-256: afce64ae6cf533de18b2f15e92bf21c2b44388cba9c7523d03110256df61da2d

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