Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ebb7a793ab1f36…

MALICIOUS

PDF

73.8 KB Created: 2021-02-16 22:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4e6918269cad56e8de4981af771cbdec SHA-1: 91e515a4d8ca12c3f37b43c46bec30933951b40a SHA-256: 19ebb7a793ab1f36b57ed8e5126536b36448361fb9f6bc661ffe93cb30cd51b2
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://crophysi.ru/strik?utm_term=how+to+maintain+a+honda+pressure+washer In PDF document text
    • https://cdn.sqhk.co/gafokoru/ajj5hbq/16162145317.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/zDkoihN/gilaxinita.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5fefc263d0ab5.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/hfgcggu/rovede.pdfIn PDF document text
    • http://podjem2.club/income_tax_calculator_using_form_16iw21t.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/4XB4hjh/jinalilebusi.pdfIn PDF document text
    • http://shop-profildoors.ru/wao_anaphylaxis_guidelines_2017z63n9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_602b5b1f8da50.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/ggdthc8/31258518470.pdfIn PDF document text
    • http://wepegudefagixu.iblogger.org/samsung_galaxy_note_9_user_guide.pdfIn PDF document text
    • http://dompodklyuch.com/kasozatabetawuvopo5v168.pdfIn PDF document text
    • http://citimart.online/sekilewixove1vh2.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/jBgfhec/firetinapepexarogos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_601a4b4b5fc01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_601a50dda9365.pdfIn PDF document text
    • https://cdn.sqhk.co/tezuzerise/xjifgdv/knights_charge_brawl_deck_upgrade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xivubijorudi.epizy.com/genetics_basics_packet_answer_key.pdfIn PDF document text
    • http://memaded.epizy.com/40928539709.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_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 5220 bytes
SHA-256: 006e4a0068623f652c899dbbc798fc053f699349107cbdea6a1f5aa49c57d756
font_01_sfnt_off0000f4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F5 10884 bytes
SHA-256: ebdfe31c182d6b0e8efe830bf23309e9c5013f500b7c28e467c54868aaf86135