Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e4506a5246f536…

MALICIOUS

PDF

98.2 KB Created: 2021-03-14 05:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 45d177e2fdf81cb7945461348e255cf8 SHA-1: 6a8019c98394aa35db229daf6c868d1f8ecfa6a9 SHA-256: 04e4506a5246f5361e59dab6ad1b04e739a5ab656369ed62b12b5835e0980c02
126 Risk Score

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 0.9997

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://ponafet.ru/award?keyword=dragon+age+asunder+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473064/normal_6002200471818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6049c7b437f96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484143/normal_5ff27fc5a89ca.pdfIn PDF document text
    • https://rasizuxuner.weebly.com/uploads/1/3/1/3/131378923/1a85124051.pdfIn PDF document text
    • http://xviiivbgz.com/kumozinaf87ys9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_602ee4f483dcb.pdfIn PDF document text
    • http://beremoter.online/tufajajarijopu9wk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fc6ae99da6e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450140/normal_5ff095881aa80.pdfIn PDF document text
    • https://kixipebirivevex.weebly.com/uploads/1/3/0/7/130739750/naripuvanab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_5fd85ac060bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_60401b4da4730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_6045880317e33.pdfIn PDF document text
    • http://buybritishcat.com/dead_to_the_world_book_online_freecojgz.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/4b81e6c8-e512-46d1-9370-d7eb7d9357c0/what_is_the_code_for_a_sony_tv_sky_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/15356139928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d8c693-c5bb-4932-a0b6-8eb766025a14/arris_tg862g_ct_bridge_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e603d31a-f95f-4f36-b8ce-e4596eaaa68f/what_are_the_types_of_school_curriculum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656f1652-f2ea-4fa6-bfd8-4afaca65c73b/sccm_install_logs_location.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/7292400212.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/demonstrative_and_possessive_adjectives_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722bfc14-50d9-49e9-970c-8ec372c8f927/lejabavev.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_off00014613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14613 5176 bytes
SHA-256: 8236cb17ed2f58a17d1e7c292650d04a5d2167fd71c867ecab2a7a87c831d1b3
font_01_sfnt_off000157c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C0 10472 bytes
SHA-256: 716cb1f4313333c97b023431ddec0f31012fe683ddfa7139a71601e10046906e