Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e6ef7f35b3a1ad…

MALICIOUS

PDF

76.1 KB Created: 2021-05-01 06:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: acde87d9b14e86c0ef0189b44cd28cb3 SHA-1: d511827aff79926a2bf4e3b1fdfd15eb4eb21507 SHA-256: e6e6ef7f35b3a1ad6dfeb7df799b8a8e20c84585da08f6140e74110af1eaf9e7
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a site hosting further malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=list+of+nurse+residency+programs+in+florida PDF link annotation
    • http://bepegut.iblogger.org/air_force_previous_question_papers.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/kowumopawiwoxakoneku.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/79768199781.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/how_to_install_magic_heat_reclaimer.pdfIn PDF document text
    • http://zasopawemumobaw.iblogger.org/71689745057.pdfIn PDF document text
    • http://wabizuvo.iblogger.org/first_alert_test_results.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/alcatel_pop_4_manual.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/macro_branches_of_linguistics.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/89472596541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusitarise.rf.gd/jipanewoz.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_042e4ddb61354b839b0b124fa089db90.pdf?index=trueIn PDF document text
    • http://nerezusilanake.atwebpages.com/basic_knowledge_of_accounting_and_finance.pdfIn PDF document text
    • https://692937ca-140d-46b9-9715-018e108c1018.filesusr.com/ugd/2540a5_24fcd15103544fdcbcc598e802dbb2d5.pdf?index=trueIn PDF document text
    • http://mesujitoz.epizy.com/virimopab.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_b53885c2fdb147f1aeb300ed6c120874.pdf?index=trueIn PDF document text
    • http://kogotiru.myartsonline.com/tubosazoluvuxax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ec24d2-c499-4ee1-9cef-8e3a0f3c1282/netgear_wnr2000_factory_reset.pdfIn PDF document text
    • http://sadesepipo.rf.gd/beechcraft_baron_checklist.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_98cf0eb6aa984817b1922705c464a971.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/638bb465-f16d-4110-9514-fa5ca395e9b5/how_to_log_into_chrome.pdfIn PDF document text
    • http://melovawofijubab.epizy.com/24322871606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a264eab4-2386-4da2-8818-a8cfd4246e5c/trane_xl_1200_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8501257b-6023-4970-a038-65abb6882475/petsafe_bark_collar_spray_refill.pdfIn PDF document text
    • http://ximitexus.epizy.com/christina_aguilera_beautiful.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_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 5516 bytes
SHA-256: c48ae97c90dc745f63cc0ec8668a44e1869810b64a1a9e4d7205466878aea836
font_01_sfnt_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 10412 bytes
SHA-256: 68de4298f144a005245bb6837926ffc405c3d4409041881fc35c6aaaebc1496a