Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a9e8dc7e4f0e26…

MALICIOUS

PDF

82.0 KB Created: 2021-03-10 10:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 518f87852cc0b4f0c4cdd1681a754481 SHA-1: a384c658ee4d76fd583784cc94d7e83be946a010 SHA-256: 11a9e8dc7e4f0e265edd3a5d3d0aba2ea103e1630fb995c4178de103f199beec
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary focus on 'https://vilenefex.ru/award?keyword=low+carb+keto+food+list+pdf', suggesting a lure to a potentially malicious site. The PDF structure and embedded links point towards a phishing or malware distribution scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://vilenefex.ru/award?keyword=low+carb+keto+food+list+pdf PDF link annotation
    • http://kavozama.22web.org/bloodlines_richelle_mead_download_free.pdfIn PDF document text
    • http://women-ita.space/vmware_horizon_client_for_chrome_version_4._78fea7.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/nutiwodutakoxizoluzu.pdfIn PDF document text
    • http://world-wildshop.com/laledizetumqynh.pdfIn PDF document text
    • http://blacklaser.ru/povavakivozedosffnd4.pdfIn PDF document text
    • http://momentshop.website/wagiwirudazokz9dt.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/bagolezefafuro.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/halloween_addition_worksheets_for_first_grade.pdfIn PDF document text
    • http://xufuzema.sportsontheweb.net/79992303840.pdfIn PDF document text
    • http://dutov.org/41542312608tceq1.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/fc666caf-f310-4b56-ac85-f4f5849ac612/who_makes_powersmart_snow_blowers.pdfIn PDF document text
    • http://zerujafulo.rf.gd/76728294595.pdfIn PDF document text
    • http://tivurazug.rf.gd/fimekeduxukexojomamino.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/jedexot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df7448f-5fed-4cb3-b66c-2d0c864f63bd/14442312522.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/two_variable_equations_worksheet.pdfIn PDF document text
    • http://sigukig.rf.gd/maria_west_side_story_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/is_there_any_android_os_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397b2089-c7be-4eed-9f81-2e459683191e/ccna_security_210-260_vce_dumps.pdfIn PDF document text
    • http://zupotid.epizy.com/74681031646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2331728-94c3-4ef5-b854-e4dffe45da62/17040295084.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/ielts_reading_practice_test_academic_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/are_whole_house_humidifiers_safe.pdfIn PDF document text
    • http://nifopufu.epizy.com/9056344452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46b4122-7d31-4b24-a6d6-9f081b152d32/rulovukefuri.pdfIn PDF document text
    • http://wovovaj.rf.gd/60006493105.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_off000104e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 5384 bytes
SHA-256: 28586b2598bdb25ef89a650e4fca4ff99329e6e6fe2790b9d023409e983731aa
font_01_sfnt_off0001175d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175D 10184 bytes
SHA-256: c47507b67a106496748c38748cf1facc82e5061424e6c4a721decd1f04a74a52

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