Malicious PDF — malware analysis report

Static analysis result for SHA-256 5088e544532fbc5e…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 05:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d13672128f50abdbbde9c45463d4abda SHA-1: d164b54c8897ce7d6b45c76d0fad21dc04f157de SHA-256: 5088e544532fbc5eaf1cf5ae6b4ead027a7178e80833dd6318f33224ad9ce3fc
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=can+you+buy+bass+pro+shop+gift+cards+at+walmart In PDF document text
    • http://clubstore.pro/coleman_inflatable_hot_tub_chemical_instructionst94ne.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/jagjhO8/sendinblue_sms_marketing_pricing.pdfIn PDF document text
    • http://repair-planshetov.ru/893106519291lzom.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/NiaqPhh/armello_android_gameplay.pdfIn PDF document text
    • http://tk-pobeda.site/mopawefojusufgfaqb.pdfIn PDF document text
    • https://cdn.sqhk.co/rizavoxaje/ChaqNhb/boxedosi.pdfIn PDF document text
    • http://leyloften.online/servpro_reviews_bbbw6ki2.pdfIn PDF document text
    • http://tevfikyuce.xyz/dotugacltd2.pdfIn PDF document text
    • http://prequester.online/mibanemodekipazutuwifuli812f8.pdfIn PDF document text
    • https://cdn.sqhk.co/jumapevuz/aNFIcgj/7965045642.pdfIn PDF document text
    • http://thehensleys.org/arjun_patiala_full_hd_movie_filmywap5wdms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_66a1c73538a24cc99770b6d41c537e9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef58c7d9-a574-44d2-a745-51b090c51c32/gamenozejetelexogeru.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/usb_barcode_scanner_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/ziguke.pdfIn PDF document text
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_9b4dc66734004ccc946a583c95bead52.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_88c50a112df34504a69d3c08d6f5f4dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b56f9b1-5adc-417a-9a67-f12aada7eb76/harry_wong_classroom_management_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/what_is_the_most_famous_quote_from_the_play_romeo_and_juliet.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/cask_of_amontillado_character_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/tosagisagosojef.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_879af8a56ff94a43b3a526fe23a2fffb.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_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 5808 bytes
SHA-256: f749c490bdaa868cf871988f82c9df2fbaa479c193f098654e0c4bdc7434fdf5
font_01_sfnt_off0000f83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 11036 bytes
SHA-256: 61f93cace8fcd310fb9f2662385b0965e58ba09e42975c608b0ea813e186e87a