Malicious PDF — malware analysis report

Static analysis result for SHA-256 affd518c44f8468a…

MALICIOUS

PDF

105.5 KB Created: 2021-03-08 22:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cab92f6273a137ee817d14ac61b1002f SHA-1: 5b3c1bd5a9692736ef5064ccf83dfeefde9aaf82 SHA-256: affd518c44f8468afb3512a0c5c9d37bf0ffa44e623760e5d391e816b33713c6
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=azamara+journey+deck+plan+pdf PDF link annotation
    • http://talajudoxuxip.mygamesonline.org/vorifotikavudi.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/r0hiBig/10904475203.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/055ec32f743.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/elementary_korean_download.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/jhbihjo/pixel_force_2_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/zofonabiz/jgxVQid/sudasapanimefinilutuxavi.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/30k_legions_ranked.pdfIn PDF document text
    • https://tipureroxagojox.weebly.com/uploads/1/3/6/0/136096040/3121585.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/TQicxgi/audio_pro_speakers_singapore.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/chronicles_of_darkness_2nd_edition.pdfIn PDF document text
    • http://gebikomuxe.getenjoyment.net/45275402848.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/jY4jfa1/guxipirekuwoleku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb9b928-a3c8-42aa-b66d-277dff4a1486/what_is_a_uk_double_treble_crochet_stitch.pdfIn PDF document text
    • http://vekujekodabudu.epizy.com/tebup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10fe5964-86fd-4bc8-8b8c-ce19743771ef/57901767512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb147e72-fed3-47b7-9443-150d8705202e/6472895938.pdfIn PDF document text
    • http://tidukuj.epizy.com/18355761822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7605a5b3-24e4-4dbf-a436-c7095ae49cea/fifty_shades_darker_full_movie_download_in_hindi_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e7eaed-9fc1-406d-b47d-b205a26bfe9e/33596682089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f77a56-7e04-4761-aabd-986c40c19338/how_to_reset_combination_lock_without_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d33796e-f8b4-4f88-8edd-000d2755df77/poxejadeduwud.pdfIn PDF document text
    • http://nujuxat.epizy.com/new_business_development_manager_job_description.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_off00016390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16390 5404 bytes
SHA-256: 828b2512265628e5e78ca5de9aa3cfd57ba89d93debd81ddd1a2a1db972ca68d
font_01_sfnt_off000175fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175FD 10124 bytes
SHA-256: d1f4ac748816371fb080fd5b51faabad52092bff2cf1ccfbf8939bd54f5a4461