Malicious PDF — malware analysis report

Static analysis result for SHA-256 debdc589155e2743…

MALICIOUS

PDF

67.3 KB Created: 2021-03-02 20:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cdc24a3c962d92805b21cd71bd89c516 SHA-1: 52d8ab4f261717d51a7edce8fbc3d5dd0c077b6b SHA-256: debdc589155e2743d1f10954e90e82d2fd92f335751cc8c04c472269a4526a46
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/wix?keyword=personification+in+lord+of+the+flies+chapter+6 In PDF document text
    • http://libralab.digital/wulegiz2dzw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_601fe155b609c.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/gdHzIHn/bad_banks_tv_show_season_2.pdfIn PDF document text
    • https://cdn.sqhk.co/fedefuxu/jDhd0zp/letep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe1035828f7a.pdfIn PDF document text
    • http://greatmasters.biz/ryobi_one_plus_reviewsd53zj.pdfIn PDF document text
    • http://g2am2e.xyz/xomugedaxinotu96xv0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_602731fa38cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_602a892279c01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowibitiki.epizy.com/luname.pdfIn PDF document text
    • http://fakeloj.rf.gd/zaparozaf.pdfIn PDF document text
    • http://renedutej.rf.gd/3937233698.pdfIn PDF document text
    • http://zotubune.myartsonline.com/how_to_cite_internet_sources_apa_format.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/fizobaxodilavodoxadituzak.pdfIn PDF document text
    • http://nugafafekovad.epizy.com/speak_now_1_student_book.pdfIn PDF document text
    • http://vuxikujare.epizy.com/stephen_king_books_in_order_of_publish_date.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_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 5400 bytes
SHA-256: 291d9532965eae4fd709750bc1cd1f68deaca248cf44ad4b5e4f5f68d358620f
font_01_sfnt_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 10424 bytes
SHA-256: 3252cd9d1c1d0757cdaf78b60e706e255d2afd3ff5a66946672b95293a83bf79