Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad414c7548a4553…

MALICIOUS

PDF

71.9 KB Created: 2021-02-11 18:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 010eac675253bb945f5c55b5d0c0ac4b SHA-1: 1edb9c7173dcc65855cb2b4c8296f4fb75ff52dc SHA-256: 8ad414c7548a4553ff3cf46e62f0aa3c7a9a8533c657619c0d9e9ab6f6bab8fb
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=nueva+ecija+zip+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5fdba3df518c3.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/jjfidji/hearts_card_game_live_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387939/normal_5ff158fb85f27.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/R1r7hiH/real_chess_game_for_pc.pdfIn PDF document text
    • http://rutonujak.iblogger.org/external_style_sheet_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ff4bbc2994fc.pdfIn PDF document text
    • http://gulakami.22web.org/15685722173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477638/normal_5feeb9cc1adf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_601ef2538013b.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/rjhujjc/liduv.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/cD2Ihgh/flights_to_hawaii_from_chicago_non_stop.pdfIn PDF document text
    • http://mirunex.iblogger.org/51089041521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ninonasoligu.rf.gd/19366139024.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/zazesamokusulatat.pdfIn PDF document text
    • http://zipoxibel.epizy.com/general_category_list.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/xigunezaxevorukuru.pdfIn PDF document text
    • http://depevatumelo.epizy.com/certolizumab_pegol_dosage_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/gilumaxevumiwow.pdfIn PDF document text
    • http://ragigixo.epizy.com/bevogufozekifiturura.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/75432166202.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_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 4916 bytes
SHA-256: d0576be3f5175fbae3f33cd025eb5453c0ef0df66d4d5b9d6668b33a7937aafd
font_01_sfnt_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 10428 bytes
SHA-256: ab9faefd96d541aa246e13efca16b84c01335f21091906197cc7a6a5eb8adb59

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