Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed113dbbf9c421a2…

MALICIOUS

PDF

71.8 KB Created: 2021-02-26 21:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d1075cac09dc0b0f9e2076c9f9ba9187 SHA-1: bfb8aeeba493d533dd0e32aae5262ad2545d74c6 SHA-256: ed113dbbf9c421a2082ad552a136d7bf9929b9e7ff9d1e0e92b5634d72f34092
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://dafemum.ru/award?keyword=how+much+weight+loss+first+month+after+gastric+sleeve In PDF document text
    • http://mamimufexaliro.66ghz.com/dolomites_climbing_guides.pdfIn PDF document text
    • https://cdn.sqhk.co/misumirotoj/ChcieCA/tivesij.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/9303586.pdfIn PDF document text
    • http://tedaxebipajir.iblogger.org/calculo_integral_conceptos_basicos.pdfIn PDF document text
    • https://tuzejaved.weebly.com/uploads/1/3/3/9/133997948/b58c9e.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/duvapuvirir.pdfIn PDF document text
    • https://cdn.sqhk.co/rapalaxob/zieiilv/spacex_crew_dragon_demo_2.pdfIn PDF document text
    • https://wuxigato.weebly.com/uploads/1/3/2/6/132680835/0c108d074.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/xugagadowizobaz_xanosawep.pdfIn PDF document text
    • https://dosoxeluniwipeg.weebly.com/uploads/1/3/3/9/133997743/nonese.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/HicggLf/17110136490.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/jhgghgq/blackberry_launcher_pro_apk.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/rolosi.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/7c6d05d6de7.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/bagokiko/7187610672.pdfIn PDF document text
    • http://fezefujeziged.epizy.com/tafuvifonoganeguv.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/airline_tycoon_mod_apk_android_1.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_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 5408 bytes
SHA-256: f36c50e0a82aeb0ee77d8c9f847433947c0303f52127712c106d3c93c0635296
font_01_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 10676 bytes
SHA-256: 2622b1d268615b61639255ad779f21025b4d410e023e17ae65d3b63490c82a47

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