Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e73073cac38fbfd…

MALICIOUS

PDF

72.3 KB Created: 2021-03-08 13:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fee06eea8fe5a3d7b284a98394b14d0a SHA-1: fcb9f542a902e02f399bbb0a8a08d23afaf43ec9 SHA-256: 7e73073cac38fbfdcacfa0ffc533ba94d77d353ebd68c6a43f851c4b395e9f89
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/123?utm_term=achyutam+keshavam+song++64kbps PDF link annotation
    • https://cdn.sqhk.co/fipakebeb/arR2gif/kumukutikutitap_music_sheet_free.pdfIn PDF document text
    • http://vakakuwumegus.22web.org/xml_formatter_notepad_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/s9FdEij/my_centura_health_connection.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/hijihjd/kiruvisidetixa.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/vNQojbv/17834581625.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/75511678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luruloligof.rf.gd/jilurirolep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a5ca4d-7633-4452-914d-ec534046fc9d/how_to_write_a_college_essay_about_overcoming_challenges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa7be94-d5ae-427a-9e8b-95c961dc8f8d/campbell_hausfeld_airless_paint_sprayer_operating_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9b1612-8b69-421b-b566-0489f960ea9c/how_much_is_an_electric_pallet_truck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1a76c9-25cf-4891-8a35-0737c86d2fca/surufomivukupo.pdfIn PDF document text
    • http://zogutofarori.epizy.com/dofozes.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_37f143784a8642a89740b5d0aba1ffce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc8a488-e00d-445e-aa3a-3bc2e28cb59e/83257104686.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_dca3e66822164ea2b8a787b9021ddca7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a8cd98-b043-4edd-9dca-68ac662aa733/how_to_tell_if_motherboard_works_with_processor.pdfIn PDF document text
    • http://texatutegelemov.rf.gd/roboleduputagusat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89db7551-f788-4a38-acfc-22de672ee6ea/javascript_absolute_position_eines_elements_ermitteln.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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 5816 bytes
SHA-256: 78b432709f034482baa723cdb6772b951d5bc1db7a57f50eba9c2b632ca7e297
font_01_sfnt_off0000ea10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA10 12116 bytes
SHA-256: c36bcf7ed48712aa712770a8fa9f64f2ee6db2ed49b04654971496e44a0a0861