Malicious PDF — malware analysis report

Static analysis result for SHA-256 362de151433727fd…

MALICIOUS

PDF

74.3 KB Created: 2021-02-22 11:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fc99050a65f3532ef18d0f134942ca7b SHA-1: 069f9204a3cf740abafbc57d5b6d3e4ec72f4934 SHA-256: 362de151433727fd49fb02ffcdd4e2187c453e5a766f7f3ba636f36d7149da32
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to thermostat reset instructions, aiming to trick users into clicking the malicious links.

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/strik?utm_term=how+to+reset+honeywell+thermostat+th8320u1008 PDF link annotation
    • http://hrushch.space/zonepajamidudijotuw5iny.pdfIn PDF document text
    • http://everydays.space/stabat_mater_dolorosa_sheet_music5knz9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_6030e835c2deb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_6003f6c896c77.pdfIn PDF document text
    • https://vadisasezex.weebly.com/uploads/1/3/1/1/131163908/ganafegabijex.pdfIn PDF document text
    • http://vvinorama.fun/tebujigowujisogujch78x.pdfIn PDF document text
    • http://hookup153.site/minaguvalawexuvavodatiyt.pdfIn PDF document text
    • https://gomamuna.weebly.com/uploads/1/3/5/3/135304292/vogejug-vulixidugavonu-mulenuduxibala-bodoxudejumi.pdfIn PDF document text
    • https://bobidowi.weebly.com/uploads/1/3/2/7/132740787/7993476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_60218dda873ad.pdfIn PDF document text
    • http://fijixedi.22web.org/two_digit_multiplication_worksheets_3rd_grade.pdfIn PDF document text
    • https://jesokawafaz.weebly.com/uploads/1/3/4/6/134626724/fuzafiga_gepavimorev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_5fd829ef35007.pdfIn PDF document text
    • http://wwnews.site/decoracion_navidea_manualidades_para_venderkn040.pdfIn PDF document text
    • http://instas.site/99367783142w3wej.pdfIn PDF document text
    • https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/141436.pdfIn PDF document text
    • http://espaceabone.com/english_speaking_book_free_download93d13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 5764 bytes
SHA-256: 349bc27f03a4807a4798df5c72f83c64c85cb8571b815c04607d6efd6caf048f
font_01_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 10592 bytes
SHA-256: 22b4f31afaf4ebb7bf29a7ca538c37bb29226ef7ac924c1ee462cace374c2895

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