Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b743e69c7caaed0…

MALICIOUS

PDF

80.7 KB Created: 2021-02-12 02:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 53748b4f6c2b72a03e33ea19c325ae8d SHA-1: 2869e3f5e8448077f8505124843836f398d8dd64 SHA-256: 9b743e69c7caaed09cd452c7bae8d0c1db5484c90c8fcf5c406d137b721b8d21
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=videohive%20openers%20free In PDF document text
    • http://gratoraama.website/462361269419yqvb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5fc82ae788f71.pdfIn PDF document text
    • http://dkshlyap.ru/64443362834m6xa5.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/eggsQiT/roxilarodimijixuweg.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/ehithal/bunny_toilet_paper_craft.pdfIn PDF document text
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/xibesasi.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/jWQgcge/15962165003.pdfIn PDF document text
    • https://rikomurisixub.weebly.com/uploads/1/3/1/4/131454733/6015647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498868/normal_600486eade4d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_600c2979c0244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367310/normal_5fed0a4fd1d00.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/3vhhAij/sobogilelarika.pdfIn PDF document text
    • https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/zepaliniti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxidolobiw.epizy.com/ravenfield_build_17_free.pdfIn PDF document text
    • http://xutirekivob.rf.gd/sidobe.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_off0000ffa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA0 4912 bytes
SHA-256: fe9651bc98fd0c47cb2022e3138e625f847b58ab8f018e9275c69de67513f4d5
font_01_sfnt_off0001105f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105F 11056 bytes
SHA-256: e1adbfaf1adc041844d5b4dbca58a0bb96d6650de90ebb0f87623299ae37f027

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