Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d04323c7e9df17b…

MALICIOUS

PDF

67.7 KB Created: 2021-02-27 16:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b68b23c8751617bc822f677840b6f2b SHA-1: da500ab59f1a60ccf41b51b4e49e62c14d2a08be SHA-256: 1d04323c7e9df17b88b407cce87fe948407c5090192476fbe60056f85b2bae3b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://dugedepap.ru/123?utm_term=polaris+magnum+425+price PDF link annotation
    • http://epaytds.xyz/jowakagekewefm0t16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423145/normal_6007587786be6.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/SK4gejg/build_a_chatbot_using_python.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_6012f923e98df.pdfIn PDF document text
    • http://vengriya.space/31231402829sh3a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fca4d7026d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5ffb806cc337c.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/Jhdkdjb/la_times_crossword_puzzles_book.pdfIn PDF document text
    • https://fusewexe.weebly.com/uploads/1/3/2/7/132712136/tabogenibobosaxosi.pdfIn PDF document text
    • http://manybigs.space/7441646099740rui.pdfIn PDF document text
    • http://detonic-buy.website/trifles_susan_glaspell_themeqj9mk.pdfIn PDF document text
    • http://moitender.org/jevoputemexabigitrtf.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/oXhiAhi/geo_book_3_charger.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/pkidgcQ/kawadijutonabogoroki.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/devexpress_report_edit_datasourcekc5jz.pdfIn PDF document text
    • http://good-production9.site/website_hosting_web_page_templatekr0pu.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/tubukeganuji/80317227188.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/printable_medicare_abn_form_2018.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_off0000cb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1B 5596 bytes
SHA-256: 9428fdcebf3274ff0ff66a2ba9d3302a132b9073acdc52d533d327b32e54e0be
font_01_sfnt_off0000de21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE21 10452 bytes
SHA-256: dff53656e057fe558afb421ed629b2ebe5ef5f47bc6c1d5ad4b8dfd4351c8386

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