Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cced039ff3bd7a6…

MALICIOUS

PDF

67.9 KB Created: 2021-02-14 22:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6b2946c7817e29e9b941a3bbff439d21 SHA-1: 213190d7f46678535535b4632af0e47fdff9b241 SHA-256: 4cced039ff3bd7a6967c8f610645eabc0a894088f5468bd14490735d3906f7bc
244 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
  • 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 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.
  • 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/wix?keyword=multiplying+monomials+worksheet+pdf+with+answers In PDF document text
    • http://liolika-rsya.ru/127434060983yln6.pdfIn PDF document text
    • https://bixolajulepu.weebly.com/uploads/1/3/4/7/134746591/gisemaloto_ziliki.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/gchccP1/tiles_hop_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lozukoxokir/geiiii0/eternal_draft_masters.pdfIn PDF document text
    • http://tk-time.site/counseling_the_culturally_diverse_thb3cxv.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/ighevja/73194883972.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/jiLVlCm/5624724964.pdfIn PDF document text
    • http://in-step.shop/pudunoropivamtzwrl.pdfIn PDF document text
    • http://znalomstvavip.site/literal_equations_algebra_1_worksheetkuaik.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/jiwagolujajiwab.pdfIn PDF document text
    • http://citimart.online/how_to_fight_sanscsprx.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/zqhehi6/tunesholic_mod_apk_2._1._8.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/27f759a323.pdfIn PDF document text
    • http://zokorut.iblogger.org/nilokaradovanal.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/hjesSXA/arena_football_league_salary_cap.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/EhdUggZ/piguxisuzugenotujewopof.pdfIn PDF document text
    • https://nofuzuvovakiba.weebly.com/uploads/1/3/1/3/131379181/sofinilof_besebob_pakejutul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC49 5716 bytes
SHA-256: f13e3f2a41ca8587566d5d1551b7fe8df404e21a97ba6ee82138a370afa76c24
font_01_sfnt_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 10132 bytes
SHA-256: 932b45e7ef3aed390cab6c58e60c98c0768ac60cd3215680f6c09cf57e4aa9fd

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