Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af7f53cfb420b96…

MALICIOUS

PDF

72.5 KB Created: 2021-02-10 22:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2982fc43a36020a22d964bb592e64c55 SHA-1: 5b14ebb33462ec0f6acf11b6e334180a74e3319a SHA-256: 7af7f53cfb420b961ca7662f5fa26106312609960ca955757aa5afae47afae44
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://yafferge.ru/wb?keyword=bolero%20of%20fire%20clarinet%20sheet%20music In PDF document text
    • http://mylic.ru/movimiento_uniforme_y_movimiento_uniforme_variado8a46i.pdfIn PDF document text
    • https://cdn.sqhk.co/gugivusofed/ahc5gf6/peloton_at_home_fitness.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/jeFjchg/10846891976.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/gh6Rib8/how_to_keep_secret_notes_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/eFhh1xV/94345525098.pdfIn PDF document text
    • http://1xbet-football.fun/zivaxomixesuduwepofjo5to.pdfIn PDF document text
    • http://adanakebap.org/18971981968h0zmp.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/jivaseker-nukanemofe-fanibexulok.pdfIn PDF document text
    • https://cdn.sqhk.co/tosaporafoxa/iahdTia/46734157662.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/P5ibyyQ/87741372834.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/lhcgdij/61595610227.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/Emibrig/83867326087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekafoweratum.epizy.com/active_directory_server_synology.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/rebus_puzzle_brain_teasers.pdfIn PDF document text
    • http://pavasokunise.epizy.com/kumon_math_worksheets_grade_3.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_off0000daca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACA 5172 bytes
SHA-256: 040325e1e7f4f198139ca8860701ea7e82baa1fb91efed89704b7c003ba1d363
font_01_sfnt_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 11872 bytes
SHA-256: cc8c8aefc759946d2cfb7b4861f16bd0ca23c97361ee2187a8247ae16940ee7f

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