Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcf43f2d4e1edf2…

MALICIOUS

PDF

68.3 KB Created: 2021-03-28 04:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d7180fefc1bfb261234fb4f1e4d78fa8 SHA-1: a12b366a41e70d91c57cd8d1071c19d19a09c08d SHA-256: 7dcf43f2d4e1edf219ed2dc43ec7ec3705c5d2d63a39bb988443a865e20ee7ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, including one pointing to 'mezovuduw.ru' which is associated with a lure about fixing a washing machine, suggesting a phishing or scam attempt. The PDF's structure and embedded links indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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+fix+a+whirlpool+washing+machine+lid+switch PDF link annotation
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/vegiziwozenaz_vopitatibiwogi_rajifekaloguz.pdfIn PDF document text
    • https://cdn.sqhk.co/sifomujotaxa/l2emn1D/bicol_university_college_of_medicine_application_form.pdfIn PDF document text
    • http://kufadudaz.iblogger.org/xajurivimotafulitafufagup.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/jcieoTb/castle_crashers_character_tier_list.pdfIn PDF document text
    • http://bcipreactivaperu.com/how_to_start_keto_diet_menu776ya.pdfIn PDF document text
    • http://doordash.link/what_does_don_mean_in_english_slangodlrq.pdfIn PDF document text
    • http://hdsamara.ru/ffx_chamber_of_fayth_guidemhbfp.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/kopikesulapomipem.pdfIn PDF document text
    • https://witojezig.weebly.com/uploads/1/3/0/7/130776148/5635658.pdfIn PDF document text
    • http://jakartapro.xyz/tugarasosetololilodvrspq.pdfIn PDF document text
    • https://mozokidadivu.weebly.com/uploads/1/3/1/1/131164210/levudif.pdfIn PDF document text
    • http://raifaisentapp.online/20547581995o2aq4.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/0900d698-37ea-41c0-9dd0-5437e41c1137/dodojesavutajetumepekati.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/69075722142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbee733-b219-40cb-9d09-f6231a9d9d49/sosakuzigidojojigikimu.pdfIn PDF document text
    • http://bemisiba.epizy.com/79861047268.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/the_rime_of_the_ancient_mariner_summary_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3230cd1c-9817-481e-97cf-8ea451c35c75/death_of_a_salesman_biff_stealing_quotes.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/candidiasis_esofagica_causas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90fe628-ba4b-4c8f-9bab-44225f6f3ddb/what_does_iso_9001_mean_to_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ddfce27-779e-450b-8264-d1e52efd6203/91267467295.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_off0000ccf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 5688 bytes
SHA-256: f0a77a5d6fed3adae688cc45585bdf7eba858004a6861da32969cdb2c5e3a739
font_01_sfnt_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 10296 bytes
SHA-256: 2bcaaabf2e5599b0ecbf2f042f6b6e187d91951c3b44eb0a28edf8afbcb16f3c

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