Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f739eaaa3cf7cdd…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 15:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3d18ab063432603ae140e9661c06e20a SHA-1: 627edcc5e31193903ec82b6c4a1d0d2eb0db70cc SHA-256: 1f739eaaa3cf7cdd1f9a95852342ac15d86e6428877678f60e3d389703218d88
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and text that mimic a 'Verizon internet tech support contact number' to deceive users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malicious content. The presence of numerous external URIs and link farm heuristics further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=verizon+internet+tech+support+contact+number PDF link annotation
    • http://kvadro63.ru/36466920048crnca.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/idWjde3/tagomivagin.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/vizio_sound_bar_sb2920-c6_subwoofer.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/gghfZjg/lagu_angklung_malioboro.pdfIn PDF document text
    • http://afracheat3.xyz/2018_chevy_colorado_zr2_owners_manual3ujoh.pdfIn PDF document text
    • https://cdn.sqhk.co/fikubife/JIgdhcP/27416108304.pdfIn PDF document text
    • http://givenoful.22web.org/digestive_system_worksheet.pdfIn PDF document text
    • http://lavka-karamel.ru/how_to_mount_a_gopro_on_a_selfie_stick9qazk.pdfIn PDF document text
    • http://invitesistem.ru/relakefda6y.pdfIn PDF document text
    • http://rekabiwuxu.22web.org/financial_statement_example_of_balance_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/butofelo/VUJiaXA/56233090021.pdfIn PDF document text
    • http://pipvip.ru/create_jar_file_using_maven_in_intellij2brag.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/beginner_pirates_of_the_caribbean_piano_notes_with_letters.pdfIn PDF document text
    • http://kayikciakademi.com/how_to_clean_hp_officejet_pro_8600_plushd1ik.pdfIn PDF document text
    • http://eushopvmn.site/basic_accounting_process_and_systemexpqs.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/20225656209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapibixofezutef.epizy.com/free_chemistry_form_2_notes.pdfIn PDF document text
    • http://virojokezof.rf.gd/51603033600.pdfIn PDF document text
    • http://rudavuzapu.rf.gd/how_to_learn_english_grammar_easily_in_tamil.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/adoption_forms_template.pdfIn PDF document text
    • http://reluwiz.epizy.com/kadonosasidenufumajeril.pdfIn PDF document text
    • http://veraliw.rf.gd/89397858030.pdfIn PDF document text
    • http://kuvujibirili.epizy.com/fatewokir.pdfIn PDF document text
    • http://dolojivek.onlinewebshop.net/puwoxapuxeva.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_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 5296 bytes
SHA-256: c277d933d70f87dae29f4adc24a75d0de620d74a18ca7954352e339e8cf5d43c
font_01_sfnt_off0001065a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 11280 bytes
SHA-256: b77c8b1479aa4d02d31f675faab9e134f55805ca6ec5351793023ab9a26b5956

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