Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a1ccbd75ef637f…

MALICIOUS

PDF

67.8 KB Created: 2021-04-20 07:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2606a59990a945d8724249749df1f124 SHA-1: cc880d50f59761663e003d49de124288cb4d84e2 SHA-256: b0a1ccbd75ef637ff6ff0ea3b3eb62d7ecf9e07b0325caebb220a04d850aa1b2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to other PDF documents, likely to obscure the ultimate malicious destination or to distribute further malware. The presence of multiple external links on disposable hosting, coupled with the 'utm_term' parameter in one of the URLs, suggests a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=ti+82+vs+84+plus+ce PDF link annotation
    • https://cdn.sqhk.co/nabixisaf/hbtyPie/mowewedijafusajovas.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/diaCoie/xabuv.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/chcjajg/dialogflow_es_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/momajuxu/ieie6gf/general_bill_of_sale_form_template.pdfIn PDF document text
    • http://myfoxing.online/tuderizejojefozirevefovubbm9y9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_5ffb4c9a0a46e.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/ahaBtig/dinosaur_bubble_bath.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/pavokonagexemanopotabopiz2pj55.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/jcjbWgc/cornell_note_taking_pages_template.pdfIn PDF document text
    • http://lofitner.buzz/lozapejuxaperazefesibugng.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/kpDjbjd/vakugazejolakijepufapunu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381541/normal_5fdccc5b55f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454424/normal_6040d9fbac386.pdfIn PDF document text
    • http://magic-spring.com/877174672846owp.pdfIn PDF document text
    • http://thrivewebs.com/ejemplo_de_un_guion_teatral_para_nios_cortokyvmc.pdfIn PDF document text
    • https://cdn.sqhk.co/zumovinej/jimjatA/jekotenopegivaves.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/jbshhhh/futafivuxupededikofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_fc7b979e50724271880bc9c71bc00a39.pdf?index=trueIn PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_3360f76d8c784597a1b3b963c131578c.pdf?index=trueIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_0119903b755d49fabdbb51becb7010f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pomaxa/dawalat.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/cisco_firewall_asa_5505_data_sheet.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_a8aeed60e31e427b99182627ce314f52.pdf?index=trueIn 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_off0000cec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC1 5044 bytes
SHA-256: 2cdce4bab7a8c377a3b443d4c0e3e5c8fa6ec826a1698bf70237622950f85b62
font_01_sfnt_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 9948 bytes
SHA-256: 56a58428883b42d2a8643660ad95f19fa3010b4065337fe22175eb6f4bba9a3f