Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce484091eab98d4…

MALICIOUS

PDF

79.8 KB Created: 2021-05-05 14:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 52367eb5e8df39edeac11d6f9f5d5425 SHA-1: 28103a29c761014f705cae747252b8019ae9d82f SHA-256: 3ce484091eab98d435924a15422650983b6becb73d3d518a692e7c6f08416d0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to a product manual. The presence of numerous external URIs, many on disposable hosting, points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/strik?utm_term=lg+inverter+direct+drive+washer+dryer+combo+manual PDF link annotation
    • http://sebowiwuzoso.iblogger.org/zuvinededore.pdfIn PDF document text
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/df1aa6bb66.pdfIn PDF document text
    • https://cdn.sqhk.co/bumotinidopi/hhigNji/duwevulojuko.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/jdjflgc/dragon_ball_legends_hack_2020.pdfIn PDF document text
    • https://wabalolosezuluf.weebly.com/uploads/1/3/4/4/134462862/fodibox.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/ihgihj7/download_cheat_banana_kong_mod_apk.pdfIn PDF document text
    • https://tolubezilonis.weebly.com/uploads/1/3/5/3/135348590/4830400.pdfIn PDF document text
    • http://noxesim.iblogger.org/22626632738.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/fewuvaxufunepoludo.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/bc020f13b9.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/lagapidik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lewuli/sample_invoice_for_services_rendered_template.pdfIn PDF document text
    • http://xilekur.epizy.com/fuvowelixifal.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/wuxazafafonanudatipin.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/74927463763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ab7a80-3ca7-43b0-b1a5-d2c3d8865e12/races_of_the_dragon_3.5.pdfIn PDF document text
    • http://lalurupid.epizy.com/physical_and_chemical_changes_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39dbea8-eaac-4d5e-884e-f2f43dbb9c5b/shimano_claris_r2000_manual.pdfIn PDF document text
    • http://riramemixezu.epizy.com/31731507752.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/24586335405.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/lopafiru.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/68258723413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85dec12d-c2f6-4b97-a54e-47eec1ce2e20/convertidor_de_miligramos_a_gramos.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_off0000f984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 5688 bytes
SHA-256: 2adc9ec660d00a36bb91210caa970134ce9cbb175d7bf2c71f856f1b2b148dfe
font_01_sfnt_off00010ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 10744 bytes
SHA-256: 5af65382c69b70891ed66d671326f6c3bc6867bfa6480d5d33bbb3a772b221f7

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