Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1259d234db3a1dc…

MALICIOUS

PDF

72.2 KB Created: 2021-02-24 04:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2709ffb62e151bae8707600b52345e0d SHA-1: 94f73609f6e8500be13e51f930b5379dac5d0368 SHA-256: a1259d234db3a1dca74934d6c9aad7567ac2da7a561ce9ce1b513c139c7d5e30
192 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kd+publishing+pro In PDF document text
    • http://pojopazutapo.iblogger.org/algorithms_and_data_structures_n._wirth.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/aDtigB2/extinction_burst_psychology_definition.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/gasakoketubefo-xaninizilapamov-paxepurasal.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/KR8ROif/pobodapare.pdfIn PDF document text
    • http://cherrypimp.online/boxotigfojf.pdfIn PDF document text
    • http://preplafond.xyz/english_language_video_mp4kpkpm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fc706cff1246.pdfIn PDF document text
    • http://passive-income.ru/685896220119hov2.pdfIn PDF document text
    • http://aycotoro7.xyz/slow_motion_video_maker_pro_apk2c728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_600610234961d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_602a50b8f07cf.pdfIn PDF document text
    • http://hamsterbig.com/exam_english_b1_grammarpcwc5.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/ibjHQwM/69828883886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421200/normal_5ffcbc9684448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_601465d12b02f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufepurobu.epizy.com/solving_one_step_inequalities_worksheet_with_answers.pdfIn PDF document text
    • http://kejefutipetube.epizy.com/malcolm_baldrige_framework_for_performance_excellence.pdfIn PDF document text
    • http://fepadegan.epizy.com/20275907725.pdfIn PDF document text
    • http://jodetiwozefiso.epizy.com/xujawumobipibusekazan.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_off0000deb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB9 5120 bytes
SHA-256: 780c974eab57af64a7c52dcb57d0e7c113d565128a41cf29e592da139952546d
font_01_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 10480 bytes
SHA-256: 40688929d071ca4d18fe79dd0c9a5c0502c12b1e1b79a232ce80b14bb304df1e