Malicious PDF — malware analysis report

Static analysis result for SHA-256 daed1f3dc8c1b1d0…

MALICIOUS

PDF

78.4 KB Created: 2021-03-23 13:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f613bfd18d69b84167157839a6760d90 SHA-1: b0d13a6d542fcc3a0c589fc898f309526b21347c SHA-256: daed1f3dc8c1b1d08dad50f84abc23f48414a94509f6ab04bbb899a5a5838ee8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=vicks+warm+steam+humidifier+walmart PDF link annotation
    • http://waferaboteb.mypressonline.com/rubiaceae_caracteristicas.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/what_are_the_skills_needed_for_critical_thinking.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/wijikeresusi-mofirokitadubez.pdfIn PDF document text
    • https://poteboxamakimef.weebly.com/uploads/1/3/4/3/134325651/narifujipu.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/kulezeda.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/dubudeb.pdfIn PDF document text
    • http://cmbclientes.com/dibisevesikasarunimudeziw7dbpv.pdfIn PDF document text
    • http://snatural.space/wonder_woman_helplesskahe7.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/dell_optiplex_760_drivers_for_windows_7_64_bit_free_download.pdfIn PDF document text
    • http://zefonurogize.22web.org/que_es_metodo_en_criminalistica.pdfIn PDF document text
    • https://malugula.weebly.com/uploads/1/3/2/6/132695531/papif.pdfIn PDF document text
    • https://tadafemuge.weebly.com/uploads/1/3/4/4/134480681/3214ccdd.pdfIn PDF document text
    • http://astrology-personal.online/xukilaroe5ey6.pdfIn PDF document text
    • https://zaranofe.weebly.com/uploads/1/3/5/9/135967679/gokanuganulivo.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/Wif0hip/blocky_highway_traffic_racing.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/gubil.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/84716581949.pdfIn PDF document text
    • http://shoppingyxplus.xyz/vovizigotefis90wzw.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/gzTahhJ/1258985610.pdfIn PDF document text
    • https://xikidofivikoru.weebly.com/uploads/1/3/0/7/130776888/dapibepaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://garozujil.rf.gd/can_i_renew_my_texas_notary_online.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/pediatric_anesthesia_mcq.pdfIn PDF document text
    • http://nedupidanasadef.rf.gd/who_were_reys_parents_supposed_to_be.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_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 5380 bytes
SHA-256: 2a3ca5c0c8958f24577bc1eeaa4546be51c6cc2861ec371b7a6e65df2af40fea
font_01_sfnt_off0001054f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 11564 bytes
SHA-256: f20bd577a9588ed12e3fb7f17faf09a6c4f582a089fc776a17dfde91b4f96f3f

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