Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afeee083a1c970e…

MALICIOUS

PDF

77.0 KB Created: 2021-06-07 05:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0ac8fae271fe8f7d7bc6286eb528a8a0 SHA-1: 1977af01f207640e9af619c2e70f99d551f17f93 SHA-256: 4afeee083a1c970e3b1cdd317ff91f8d0de8a63c27ffe0e5382c29af54bec5df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/123?utm_term=candy+crush+saga+score+hack+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384650/normal_6009d73a8e4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417419/normal_5fe19008376a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_600797f10d403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_6047b0b355c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_6027e348c88be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5fecb3f090020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunixove.pbworks.com/f/6776305758.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/65743593793.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/w/file/fetch/144756009/adb_install_apk_install_failed_version_downgrade.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/13444093471.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/rikitilumovunoduzigupun.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/w/file/fetch/144753471/where_to_download_kannada_mp3_songs_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504f6db6-a282-4e01-b850-c70645b06471/dowazitofi.pdfIn PDF document text
    • http://vifogajo.pbworks.com/f/52592411682.pdfIn PDF document text
    • http://mutatalibo.pbworks.com/w/file/fetch/144605736/pupoxexagesimijizazar.pdfIn PDF document text
    • http://kuxuraroj.pbworks.com/f/megonutozejer.pdfIn PDF document text
    • http://tuvovazuvezo.pbworks.com/w/file/fetch/144763467/a_beginners_guide_to_investing_ivy_bytes.pdfIn PDF document text
    • http://xemademeku.pbworks.com/f/93730348363.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/zekuxon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a8ddd4-c049-441d-aa76-edc22540f47c/how_much_kelly_services_pay.pdfIn PDF document text
    • http://betifabito.pbworks.com/f/everyday_science_book_for_pcs.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/w/file/fetch/144727623/the_human_centipede_download_isaidub.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/how_does_colorimetric_analysis_work.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_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 5240 bytes
SHA-256: 2fc89b517dcbf5a8b8459f01fe5eacc30aa8c0064b99a382e212c04f9117ab66
font_01_sfnt_off00010286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 10608 bytes
SHA-256: 2f9b8b513cc45ccbb6279945752444fca062ddcdd63011729b1f9b49a4173015

Open this report in the interactive analyzer, or submit your own file for analysis.