Malicious PDF — malware analysis report

Static analysis result for SHA-256 1775a0c45b1a88c3…

MALICIOUS

PDF

72.9 KB Created: 2021-02-16 19:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e6423a681596781038f26292efd70751 SHA-1: c5caf890eae3a4749f504a3570ef872967b947c4 SHA-256: 1775a0c45b1a88c33720dd9ebadc2390a5c87e554fd8eb4de89361ce762d8c54
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=bill+nye+the+science+guy+weather+and+climate+worksheet+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480595/normal_5fe33a8b82a09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5fe7783b73549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fe8d55ea07f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_6028658a549b6.pdfIn PDF document text
    • http://astropsychology.website/33636373343s8erf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_6013a2179822a.pdfIn PDF document text
    • http://fuzirirofo.iblogger.org/coochin_creek_fishing_reports.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393624/normal_5fcdb0126696a.pdfIn PDF document text
    • http://tronreserve.online/tabela_para_torneio_com_6_timesycuyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_6015ccce7e38e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/eating_for_your_blood_type_book.pdfIn PDF document text
    • http://puwukuju.epizy.com/60746952306.pdfIn PDF document text
    • http://rafubapon.epizy.com/36028245309.pdfIn PDF document text
    • http://wutopow.epizy.com/gezabotaka.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/form_submit_button_disabled_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/steel_compression_test_lab_report.pdfIn PDF document text
    • http://gorevifero.epizy.com/jabra_elite_65t_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/japan_guide_nagoya.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_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 5660 bytes
SHA-256: cd923a320bd2f3ff5548ffd70e11a611d26afafd40c352a01502dfadf6d52423
font_01_sfnt_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 10640 bytes
SHA-256: 4aa85789a743d4aa733b87057b4699a0dffcfb0b13798e6ddb46674edc07bbfa