Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca25fc4ffdc5c7a…

MALICIOUS

PDF

70.5 KB Created: 2021-01-24 16:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 124c485b372c1a1c5d2c9969f7f8c66b SHA-1: 24bd3b5e42e3c7a662811f0998f4c67fac424cf6 SHA-256: eca25fc4ffdc5c7a31a1b52131a92333bbea23e31822f841d0efce94e26bc964
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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/123?utm_term=todd+andrea+breaking+bad In PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/4875655.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/f9jgXmn/loud_voice_ringtone_app.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/c6fc247ce7e.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/cdji8zA/vetitimukejuti.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/eT2s33u/telehealth_occupational_therapy_jobs_salary.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/strike_force_arcade_fps_dominator_ps4y7240.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/xavep.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/iePaiaf/90831005873.pdfIn PDF document text
    • https://zutiwemozebej.weebly.com/uploads/1/3/2/7/132712207/3cd00fe.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/HghdhcY/girasib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejarajavamoge.epizy.com/puwodixapokok.pdfIn PDF document text
    • http://xejarejunap.rf.gd/mugazufikiw.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/4394697153.pdfIn PDF document text
    • http://sivebiza.epizy.com/dowutujapodizigasawipiruv.pdfIn PDF document text
    • http://keputeka.epizy.com/wivusuwasetij.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_off0000d78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78E 4936 bytes
SHA-256: fd1e28d839c3e7be468283635f4e285a8061b86fa14772ffbf2faea8bcaee3af
font_01_sfnt_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 10828 bytes
SHA-256: d3c8a01954b4cfb78db5b69f9189f6c4e09348c0c00a0ced435b52e0f6e78795

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