Malicious PDF — malware analysis report

Static analysis result for SHA-256 77beffed15db103c…

MALICIOUS

PDF

71.9 KB Created: 2021-02-12 16:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f15cbf247b8479b9102aba564ac03cab SHA-1: e33853c13684737ab149fb98418c8c1dd77c758a SHA-256: 77beffed15db103cba37e3736b259ec48380bd77ba26462f9c2202bcca28a8c1
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/wix?keyword=chemistry+for+changing+times+14th+edition+pdf In PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/naxijutoremo_gejowupa_xebalowikidodiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_600b9a55db62e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3b2db2b96b.pdfIn PDF document text
    • https://tokuguzeg.weebly.com/uploads/1/3/4/4/134464653/309836e.pdfIn PDF document text
    • http://wukosuwusa.iblogger.org/instagram_videos_online_free.pdfIn PDF document text
    • http://fujopijur.iblogger.org/zuxawufaserurotuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_6000baa1e937b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temomuduzuba.epizy.com/gustavo_santaolalla_babel_free.pdfIn PDF document text
    • http://vegexiwijije.rf.gd/58886721384.pdfIn PDF document text
    • http://kimitumepogamom.epizy.com/rupinder_gandhi_hd_movie_full.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/58118810249.pdfIn PDF document text
    • http://pesuvomekujidi.rf.gd/exponential_equations_with_different_bases_worksheet.pdfIn PDF document text
    • http://wubuxosivukip.epizy.com/company_accounts_format_in_excel.pdfIn PDF document text
    • http://mejitakofiragi.epizy.com/sujojijujati.pdfIn PDF document text
    • http://kogosez.epizy.com/types_of_interest_groups_icivics_worksheet_answers.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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 5684 bytes
SHA-256: 50b131db83d68249ac316b78f33cca39b162b868de5b9e7908a00cc3b9a7cee4
font_01_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 10168 bytes
SHA-256: d207574671eb5c071269ef581e29ec49ffa5b5ef240dec66d3ee09bc5e93724b