Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc593281e47c907b…

MALICIOUS

PDF

76.0 KB Created: 2021-03-18 06:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f18bd6c5d4256cf5a35183fb492d0b45 SHA-1: 1560d065e1a8302abf6589450aee8b808680772d SHA-256: cc593281e47c907ba111da5e0cc051fde76da9521ac15ee263478c22c6b6a21d
126 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded URLs pointing to various domains, many of which are associated with link farms or disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as Pdf.Phishing.Trojan. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=dc+oakes+brewery PDF link annotation
    • http://gejedesoni.getenjoyment.net/matitekajemezisukute.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/ataxia_telangiectasia_2020.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/sikiv.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/dell_optiplex_960_manual.pdfIn PDF document text
    • http://sowurokirifi.22web.org/lojokozijokanunifabe.pdfIn PDF document text
    • http://jetinaxisodew.mypressonline.com/lysistrata_full_play.pdfIn PDF document text
    • http://niludop.22web.org/26518729022.pdfIn PDF document text
    • http://laruvunowos.22web.org/xivezin.pdfIn PDF document text
    • http://revebinepuv.iblogger.org/mipikufaw.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/cnidarios_e_poriferos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_8e3921a6db42459b8f1f864dd7b0e340.pdf?index=trueIn PDF document text
    • http://samesesodore.onlinewebshop.net/states_of_matter_worksheet_3rd_grade.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/vilidexiwol.pdfIn PDF document text
    • http://fabibupotiliba.epizy.com/kaluvavuzejorikadurifo.pdfIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_eb1dff04b8e44c899074270d3acc9c4c.pdf?index=trueIn PDF document text
    • http://tedivepi.epizy.com/78160341386.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_a725ac69a57149ab8cfdf81087511730.pdf?index=trueIn PDF document text
    • http://nejowubixulifud.rf.gd/acls_course_manual.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/persuasive_essay_prompts_for_middle_school.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_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 5160 bytes
SHA-256: f5c0c78677f83c06db53aac570d67b030568d02e627063d9f316dc7eb3cf22f0
font_01_sfnt_off0000fb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB25 11396 bytes
SHA-256: 51f6578ae3a417ac49d5dec445ed15830985278ce2a12a7bdc0921f09e44791d

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