Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a94856be2ecf03…

MALICIOUS

PDF

69.6 KB Created: 2021-02-14 17:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2f44c744ccbdf0801c5e76ca8cef4a1e SHA-1: 226565a3a3c11b5eeb54f157bc620ca88163feeb SHA-256: b1a94856be2ecf0395c9109d17080e470ad78059f8dce5411a28d203c91dce5f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=locomotive%2038%20the%20ojibway%20question%20and%20answer In PDF document text
    • http://remont-kvartir-otzyvy.moscow/diy_crib_sheet_no_sewo6a34.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/2qGWFUn/97363101869.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/idihMhh/kopitudag.pdfIn PDF document text
    • http://tk-time.site/new_album_songs_tamil_video3cen5.pdfIn PDF document text
    • http://bit-ipo.ru/conic_sections_problems_and_answersknztc.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/njechuI/96004424734.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/GSTRhc8/hidden_agenda_ps4_cast.pdfIn PDF document text
    • http://womenit.space/interactive_journal_templatesk2jly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofufinaniba.rf.gd/kazemegov.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/zelolagobimapiwot.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/subtracting_fractions_with_regrouping_common_core_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/dionne_farris_hopeless_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/attrition_mill_working_principle.pdfIn PDF document text
    • http://fuzakumadobujav.epizy.com/uniform_crime_report_history.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/kerala_university_bsc_physics_question_paper.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_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 6040 bytes
SHA-256: 2a72a0a8c8a63e2ff35d26e7b110f33d3e54ee80bd9408d9b2c5b05fbb21f53b
font_01_sfnt_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 10356 bytes
SHA-256: 9219110cae592f3eaa5b359fcac955c0f07f6c0c756ed5918a4fc7fe8761f148