Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3e5a7888004e51…

MALICIOUS

PDF

77.8 KB Created: 2021-05-17 08:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ad843f9cdeebc89bb163d368ab34a0fe SHA-1: 513e449d0915dfecfc760aaca7db7e690df5e3f8 SHA-256: ed3e5a7888004e51dc197964b2edbf9566a6f7bc28d3f9617d4cb0b202e30668
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were extracted, the document's structure and embedded URIs indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/strik?utm_term=cu%25C3%25A1nto+tiempo+es+normal+que+se+retrase+la+regla PDF link annotation
    • http://burrrhey.tech/english_to_bengali_translation_dictionarydxdlu.pdfIn PDF document text
    • http://instapriz.website/97891413146u330z.pdfIn PDF document text
    • http://xilagima.66ghz.com/salebumefuzaref.pdfIn PDF document text
    • http://instapresent.site/4139118214py93h.pdfIn PDF document text
    • http://thefortykuti.com/asus_m2n68-am_plus_manual_espaol36ezp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_60490cc5556d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_60562e8707b34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fe3bdcc4869f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_6041836d14897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_60170a887023a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472204/normal_602407b10bab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402745/normal_60053d0611074.pdfIn PDF document text
    • http://labincom-med.ru/priston_tale_guidert7m5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5fc5e04f45e90.pdfIn PDF document text
    • http://guwusovonolus.iblogger.org/what_is_the_importance_of_the_mahabharata_to_indian_culture.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/4982f1ac-5466-45e5-9185-00fe3151bbad/how_do_i_clean_the_filter_on_my_maytag_bravos_washer.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_5861831c3b2440cd8b06d4b62defd231.pdf?index=trueIn PDF document text
    • http://dizavinizekabos.rf.gd/a_an_the_no_article_worksheet.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_3e4b13a457af4fc8bf52c98920132cd9.pdf?index=trueIn PDF document text
    • http://rivejekab.epizy.com/19955050383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21a774b-86f3-4f49-89cb-dbfbb1ca3a98/jumanji_book_free_download.pdfIn PDF document text
    • http://powosegunivu.epizy.com/top_chm_reader_for_android.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_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 5404 bytes
SHA-256: 6996056d0b99a958f153de6ebe6647f590b986bb98cb4f916de30d27914e07a3
font_01_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 12000 bytes
SHA-256: 2abed220b2f423ee881eb39fe358f4f12c6024b95e7a59e3d99b67bb9c99788d

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