Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afe950e7543b834…

MALICIOUS

PDF

86.4 KB Created: 2021-04-30 20:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: df1721b6f9c3a62dc78cf1e44fd4da77 SHA-1: 8d84477f210c3ff2b4f74611707abec78f0c4e3e SHA-256: 1afe950e7543b834a1fd6c661385c3a8fdc0e6c2daf70e80ca668ae7cef862f4
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 0.9990

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://nipisod.ru/strik?utm_term=what+is+fire+and+blood PDF link annotation
    • http://kegetisa.mygamesonline.org/business_environment_tamil_book.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/arasu_cable_tv_package_details.pdfIn PDF document text
    • http://gonzo-3d.com/reterasobikmhm0.pdfIn PDF document text
    • http://vekvelo.ru/whatsapp_new_version_freem9y32.pdfIn PDF document text
    • http://cardio-active.site/461881778095cyz1.pdfIn PDF document text
    • http://apsmall.space/qlikview_training_material5ogk6.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/94589830124.pdfIn PDF document text
    • http://wiinorama.website/sword_art_online_progressive_7_release_datepmp1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5fdfdc9b87f1b.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/que_es_la_afinidad_electronica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_6015c475a947b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454819/normal_600fb3149f706.pdfIn PDF document text
    • http://allerop.xyz/baraxidunekoxualehc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_600654f6b6e88.pdfIn PDF document text
    • http://familyit.pro/545996938117pf3b.pdfIn PDF document text
    • http://gomesuzos.mypressonline.com/nivizobanonalas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_5fda31161cd58.pdfIn PDF document text
    • http://medtechnika1.ru/912672087373zght.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/livros_apcrifos_minhateca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pimimozoji.myartsonline.com/40159214113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062ae647-4bfd-4aa1-9c2a-cfde9a996c8f/bushmaster_mod_xm15_e2s_accessories.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/50626123833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42cf4f7-424c-4e4c-897b-f5a6b2537b03/69412508350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72afef55-3814-47fc-afd1-49318e17c420/28627205213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638ca978-ba7d-4b4e-a769-b91f75b4bd98/alone_together_turkle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 4936 bytes
SHA-256: f58bf99dcad20b1e03b27b9df31e0cf320356bebda845daadc6cac866d260f1d
font_01_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 11032 bytes
SHA-256: 5917fdcdcd38de3f1edbccf217384455f8a02e13f515fc61785299f27c18f2ca
font_02_sfnt_off00013e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E05 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e