Malicious PDF — malware analysis report

Static analysis result for SHA-256 b525e466b4468542…

MALICIOUS

PDF

71.5 KB Created: 2021-02-05 15:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 348b424858454d1f1ef5b9b6aef8d3de SHA-1: a1059b19bf20e3e8954234c350541f530e36f19c SHA-256: b525e466b4468542e9da026f2a31ec7101b1b940cb4ab059e2a52a2ba5d9b288
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/aws?utm_term=ez4ence+piano+sheet In PDF document text
    • http://kirisixifikixon.22web.org/following_instructions_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/telapunojawu/jeGhf8O/8580701784.pdfIn PDF document text
    • http://godumos.22web.org/35458977937.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UhUieE1/69155025726.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/winter_hidden_pictures_worksheets.pdfIn PDF document text
    • https://rawowoxok.weebly.com/uploads/1/3/4/3/134309987/4871072.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/lixasesa.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/winifolepaneki-mukawavitiz-vufoki.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/jaxusuxe.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/77d7408f90e.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/jjDjjnz/rolemararavabinokikelu.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/zoxobef_nudulogozal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zavufomagug.rf.gd/get_free_credit_report_once_a_year.pdfIn PDF document text
    • http://kanisal.epizy.com/baseball_scorecard_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/all_s_faire_in_middle_school.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/suwowikufuxel.pdfIn PDF document text
    • http://furugavasipif.epizy.com/13839964075.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/audio_song_punjabi_new.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_off0000db62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB62 4988 bytes
SHA-256: e8f9139c01f70f22ed7fc33d359ad1869c438c0ba328afa02fd0264f7218665b
font_01_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 11036 bytes
SHA-256: b2e96e71e626c39f430f3ad8d31021eb196fa2b08711dcc250b4bb58dfc7c3f7

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