Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebbdf4d96a9850c…

MALICIOUS

PDF

105.2 KB Created: 2021-02-25 04:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 08c206904d17d1cb13a354ea22bd174c SHA-1: 32659cf516ef14ace5369c8f6b87142eeff53268 SHA-256: 9ebbdf4d96a9850ca8aadf5874eedb36a3ec1a29e91303ca5b868429bff3406b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('druttle.ru') and associated with a link farm heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=final+fantasy+7+remake+combat+tips+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454162/normal_5fe195ac99038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_602315f3e5e1e.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/koduxifa.pdfIn PDF document text
    • http://dalnoboyi.xyz/homerun_battle_2_cheatss39ul.pdfIn PDF document text
    • http://xtreme-sport.ru/68452424341ixiqg.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/1172248.pdfIn PDF document text
    • http://hookup671.site/suxokikunevurlysob.pdfIn PDF document text
    • https://tubuzitobez.weebly.com/uploads/1/3/4/1/134108618/860502.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/james_and_the_giant_peach_summary_chapter_36.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/fanewasidokesupep.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/8403441.pdfIn PDF document text
    • http://sukujugonada.22web.org/form_arcosanti_instagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dixaleko/boxexilapuzilow.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/dumiri.pdfIn PDF document text
    • http://lewuxiboru.epizy.com/17121727431.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/what_do_you_call_a_person_without_a_conscience.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/15651922113.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/bepitezek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDC 4316 bytes
SHA-256: 76833c7d74014dde616eb3a5200a1f231dc45adc238eb662c0c395cc0cc1724d
font_01_sfnt_off00015b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B0E 5640 bytes
SHA-256: 0144801d8ea647e114696a49e3c94ab64a95371b1d6f8f1a7ba6e23ab62e8408
font_02_sfnt_off00016e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E3F 11504 bytes
SHA-256: 2898ff796a080ce9f4f6560dff77ee009baa19efe5975ec0097a7493608a0b07

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