Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db0b5ac6c876565…

MALICIOUS

PDF

68.7 KB Created: 2021-02-23 01:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ab618a7197079fdbbe0790273a242918 SHA-1: 397bed2e8d11977d0f2d86e84f923eac74971d4a SHA-256: 4db0b5ac6c876565f0ca42ab12b53660a7507de935f83ba26e135e123c673062
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://seumenha.ru/wix?keyword=pearl+harbor+analysis+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/zebimapajod/eJ42i6J/photo_tool_dv_lottery_mac.pdfIn PDF document text
    • http://sushibara.net/doctors_note_for_work_freebllov.pdfIn PDF document text
    • http://kawlites.online/35694435435vh3b2.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/chbCKs2/6671904199.pdfIn PDF document text
    • https://kinotadi.weebly.com/uploads/1/3/1/6/131606109/ac65a14b.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/jfyhUgi/90011970904.pdfIn PDF document text
    • http://navalny.design/53998468519spjvk.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/yhagedW/32284516858.pdfIn PDF document text
    • http://efarbok.xyz/update_gradle_android_studio_ubuntu8b51b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xexagum.epizy.com/safokal.pdfIn PDF document text
    • http://vaterojot.epizy.com/baxiri.pdfIn PDF document text
    • http://kotuwelu.rf.gd/simple_comfort_3000_thermostat_manual.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_off0000d1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BE 5172 bytes
SHA-256: f8ae1a39667b93d4173e57db96ece4d00cda67f17c709da479386c8b923db81b
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 10124 bytes
SHA-256: 52a56baf4b330affa92e8d7b88f1a44d6795a0d1b4e80690d3aa1b90a1325178