Malicious PDF — malware analysis report

Static analysis result for SHA-256 44492d363b37716e…

MALICIOUS

PDF

76.7 KB Created: 2021-01-26 23:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 545c1b1e292a4543ef8183d49dfb80f7 SHA-1: ed7bb7b4a813ba4a671d0a52bbd301bc85623c00 SHA-256: 44492d363b37716e2755e8fc3ee1fae32e1d500dc89dac9b3092a659cd29fc49
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=stick%20fight%20archer%20mod%20apk%201.%2018 PDF link annotation
    • http://puviwaxeraw.22web.org/wirolagotuluxebapopularen.pdfIn PDF document text
    • http://microdigitalmeter.xyz/bixabeguvagxkgt0.pdfIn PDF document text
    • http://sexesex.site/58376234819egzir.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/840570483469tf27.pdfIn PDF document text
    • http://fegebekuxew.22web.org/gomawig.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/persuasive_essay_school_uniforms_should_be_mandatory.pdfIn PDF document text
    • http://muparizuxufuxud.22web.org/kho_kho_score_sheet_2018.pdfIn PDF document text
    • http://goossyy.online/kejuzuwedodamanuxipygr0y.pdfIn PDF document text
    • http://bitcoins-profits.com/jump_ball_2k20p5t5j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://verirajoxa.epizy.com/17339540293.pdfIn PDF document text
    • http://ninalosuza.rf.gd/manufacturing_process_flow_template_excel.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/best_whatsapp_status_mp4.pdfIn PDF document text
    • http://mafofeguf.epizy.com/day_of_the_dead_mask_template_printable.pdfIn PDF document text
    • http://vanakodezifezuv.epizy.com/r_markdown_report_tutorial.pdfIn PDF document text
    • http://pimibini.epizy.com/bengal_tiger_telugu_movie_songs.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/gusesid.pdfIn PDF document text
    • http://kibomurabinide.epizy.com/pogixu.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_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 5804 bytes
SHA-256: 7196d6439abf2ee75a9bee38eeb2e35b16d2a1ea5287f054325ea8cfa2e29c6b
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 11872 bytes
SHA-256: 5d73a9ee05fbd50b82f9dbb651c3aa01b1a7f4cdac4432303cf69549d816fc15

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