Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e5017c9165166a…

MALICIOUS

PDF

85.6 KB Created: 2021-03-18 23:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fcce37094895faa75fee5ffce938a45d SHA-1: 3caaa0847583410412a0149a873cab44825746b9 SHA-256: 26e5017c9165166aff93a85875cc1507b58332ca635c7784d66505601170e29e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and a potential phishing/malware delivery mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/award?keyword=vidyasaarathi+scholarship+application+form+pdf PDF link annotation
    • http://nashremont.site/formato_para_minuta_de_reunion_excell8gup.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/digenesegudexafivu.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/maze_runner_characters_newt_real_name.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jibotula.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/tomoxigodabuwuradatesav.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/bissell_proheat_carpet_cleaner_manual.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/84521791627.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/xfinity_remote_control_soundbar6g0s1.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/batiku/70623334849.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_8f4b32baf35d408289621e48ce3b7f44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe81a06-7f69-4720-bd81-d6d03846f073/scag_patriot_52_owners_manual.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_d2f5e919dfcc4fc9aed82e932f7b3a03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25e5512-ec77-4167-948f-1d79e97e1ec1/ghost_rider_boy_full_movie_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714ae588-fd4c-4b94-8d8a-7a331d8dea6a/universal_studios_stairs.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/sony_str-k740p_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4b6141-5814-4846-a55b-4149a28d64c8/what_if_movie_2010_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/hp_elitebook_folio_9470m_lcd_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308f7cdc-4a54-44fa-8faf-a2a78aa0d9f9/poxelajarilonebunelosat.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/convert_to_word_doc_freeware.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/python_string_format_method_examples.pdfIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_609da63f8c684c2ea2aa4a3f3da6e9ac.pdf?index=trueIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/estenosis_del_acueducto_de_silvio.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_325e4dd74e494acb8c9930f5b8469e68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/tabijiwufalelikimag.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_off00010d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2A 5460 bytes
SHA-256: d234cfe0e834295955b6afbb2eb040ca99de7c3950eb042bec6bfa69eb11b8f2
font_01_sfnt_off00011fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA5 11524 bytes
SHA-256: 66f5af4ccee13da71a8c0303062eb076da724ecb9bbb70ba3e77bf4befe12b4c