Malicious PDF — malware analysis report

Static analysis result for SHA-256 257314f96eaf9136…

MALICIOUS

PDF

72.6 KB Created: 2021-05-13 00:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ccd80d3b55588f2e3c86de2145ec9719 SHA-1: 6232cae1de48d2751d799365b3bddb3cf53328f7 SHA-256: 257314f96eaf91366eae9db22cfe60df71cc5ea128bd802aad103480b3b0a7ad
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that form a link farm, disguised as a guide for resetting a Honeywell thermostat. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, with many links pointing to disposable hosting. The ML classifier and ClamAV detection further support the malicious verdict, suggesting the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/strik?utm_term=how+to+factory+reset+honeywell+touchscreen+thermostat PDF link annotation
    • https://mifanalukuzesu.weebly.com/uploads/1/3/4/6/134688284/3833408.pdfIn PDF document text
    • http://ecoservice-vlad.ru/how_does_a_series_of_unfortunate_events_end_netflixfrmmi.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/gd3lgea/new_apartment_guidelines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_6054f1f26bd8c.pdfIn PDF document text
    • http://sandwichhq.club/77520136023goy97.pdfIn PDF document text
    • https://fupegaketivira.weebly.com/uploads/1/3/4/8/134887529/sibubomusojitibibaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_6069982615a4f.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/c5IAihR/wumisefewad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_60023b86a002e.pdfIn PDF document text
    • http://zoom-omsk.ru/unitekno_703_manualnezhb.pdfIn PDF document text
    • https://sewigidafison.weebly.com/uploads/1/3/5/3/135316790/puveg.pdfIn PDF document text
    • http://marketeuro.pro/indica_las_profesiones_que_asocias_con_estas_palabras._modelo_emociones_psiclogo_or_psiclogavoayy.pdfIn PDF document text
    • http://vovpomnim.ru/kaniwoneziruxbzk6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_5fe6f2b00fe3a.pdfIn PDF document text
    • http://1xbet-registrat.site/word_families_kindergarten_activitiesfgjcu.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/0oimozT/hunter_jumper_music_video.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/how_to_move_your_head_to_get_rid_of_vertigo8e8zg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_6055847b9511e.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/3b825756-6e09-4da1-b56f-0d6921a7f5e0/bukevuripigux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c4bff9-b36c-4bca-88ca-74565fc2291b/17245641368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27ca293-2977-4e2b-91b6-e37860a588af/my_bissell_crosswave_wont_pick_up_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848b6ec1-c325-4aa3-8b8b-050b6f77b623/4940706521.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_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 5276 bytes
SHA-256: 29c4a589102519669f6603afeee4717b232207514e9d8c4700faad9b06e8b359
font_01_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 10212 bytes
SHA-256: 86eab69264ac3af65fda7150fa4e84d1caec3f9e21d5bcf509e317d4d736cb4e

Open this report in the interactive analyzer, or submit your own file for analysis.