Malicious PDF — malware analysis report

Static analysis result for SHA-256 365c6fec5fada264…

MALICIOUS

PDF

79.8 KB Created: 2021-03-17 20:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 463c1ceb8a623e330e3a232289f4cabd SHA-1: b31168710049ed93c5b5d7c61505db630015a391 SHA-256: 365c6fec5fada264bfbf1717cf903ecbdeec5ace6720160fe0682bdd69c052fe
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 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=new+home+construction+checklist+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373281/normal_6011e3f759975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5fe90953c14bf.pdfIn PDF document text
    • http://vlada4.xyz/hoverboard_in_store_pick_upentpt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_603af7cca83a7.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/apc_be550g_ups.pdfIn PDF document text
    • http://mbfsopg.com/ragoropevujigefanolegaub5i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fed3f581c74f.pdfIn PDF document text
    • http://vibawukukar.iblogger.org/la_vie_en_rose_guitar_tabs.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/convert_powerpoint_to_keynote_ipad.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/the_handmaids_tale_movie_1990_online.pdfIn PDF document text
    • http://liko-sneakers.com/how_to_gain_weight_working_out_at_home81y6m.pdfIn PDF document text
    • http://nuverlites.online/calvin_and_hobbes_complete_collection_paperbackna6dy.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/jujivenixowufipopobera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5fcf8939a4bda.pdfIn PDF document text
    • http://sexedate69.site/experimentos_animales_y_humanos8cgth.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowawaba.atwebpages.com/tukonajabivixaj.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_b378651d8cda469da89752b6363e4fb1.pdf?index=trueIn PDF document text
    • http://bukaduxanob.epizy.com/pixurenotopumawirowo.pdfIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_79064b21a122441a9c310e6b0d928a9c.pdf?index=trueIn PDF document text
    • http://vuxubeso.rf.gd/sasujudalugi.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/dedatanexitiwepoxig.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_0807b599c41441bd998e7a56ab128d4a.pdf?index=trueIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_99454e0d11454581b9a8c9d15be7d173.pdf?index=trueIn PDF document text
    • http://ropupifalapoges.atwebpages.com/how_to_negotiate_higher_salary_after_job_offer.pdfIn PDF document text
    • http://peledopa.myartsonline.com/how_to_use_a_presto_weighted_pressure_canner_canner.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_48ae7d56082d43e6ac1b303839c30fa2.pdf?index=trueIn 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_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 5300 bytes
SHA-256: 3956965c57b2c654b10d8fa0df6149805138040a91d8e103d239c04aab9d675a
font_01_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 10604 bytes
SHA-256: 072144322d43733e4e6d4f00f04ee91feb32fadcd2ae0052ee6fb5691d64b744