Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5985ac791f6a1d2…

MALICIOUS

PDF

68.1 KB Created: 2021-02-06 09:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d1ef56c75eb30c1f87e6072759371050 SHA-1: e130a29fe1144f0bfc813d00c9bdf225bddc3598 SHA-256: a5985ac791f6a1d2c90594aabaa159c462107d01fd7d090990a56336b8dba88b
244 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 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/wb?keyword=gender%20mainstreaming%20guidelines%20kenya In PDF document text
    • https://cdn.sqhk.co/vevajewez/gRfgigh/flying_bird_toy_on_a_string.pdfIn PDF document text
    • http://rivuxini.66ghz.com/12785307390.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/iJmjjig/download_call_assistant_fake_call.pdfIn PDF document text
    • https://cdn.sqhk.co/nogedapuvul/aNhgij6/lozatilagetop.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/linuj.pdfIn PDF document text
    • https://pizeposinejuxow.weebly.com/uploads/1/3/2/6/132695365/ralajanite.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/bagcCjb/adobe_illustrator_draw_free_download_for_windows_8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5ff553de13b23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_600340c7b7f19.pdfIn PDF document text
    • http://berozava.iblogger.org/bnm_ccris_guidelines.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/fotepopunaj/buhler_industries_annual_report.pdfIn PDF document text
    • http://kowisefofob.epizy.com/69337686412.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/bengali_language_new_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/perimeter_and_area_of_right_triangle_worksheet.pdfIn PDF document text
    • http://difiwawi.epizy.com/13638052823.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_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 5340 bytes
SHA-256: 1e0a3ba128d5a50ccd08bd01b5a64aeefe9288e87573cb3e06d6fbdd542cddd4
font_01_sfnt_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 9820 bytes
SHA-256: e5e8944bee1369f4eac0eae1e0e27affff68c5699febc6ad9e5b8240a5fd5502

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