Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4ff9012ff251ce…

MALICIOUS

PDF

74.2 KB Created: 2021-02-17 22:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8db8ad3ef50ea30ce90872d841e19c85 SHA-1: 64d340414d7e106f70505f78869d0bf4ec23ac30 SHA-256: cc4ff9012ff251ceaea7b834ea3e14b40f25841fb0df14b47ed534797be44fa2
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=is%20the%205.7%20hemi%20a%20good%20engine In PDF document text
    • https://cdn.sqhk.co/lofakekaf/CS1hcig/65437367893.pdfIn PDF document text
    • https://vofaxarexokuj.weebly.com/uploads/1/3/4/7/134762848/8225243.pdfIn PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/tojeramon.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/36b91519d42589.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/cE0pjgd/the_king_of_fighters_98_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xugavizira/KjageSS/deep_ocean_shark_attack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5fc7a75f3415b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5fd078216b17d.pdfIn PDF document text
    • https://sisuveraxom.weebly.com/uploads/1/3/2/7/132740665/4036066.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/yongnuo_yn560_iv_guide_number.pdfIn PDF document text
    • http://gitamoravazini.22web.org/vubezeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/ehixjd0/92018987740.pdfIn PDF document text
    • http://felidefewipikig.22web.org/gqom_acapellas_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimozan.epizy.com/19362383472.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/2146555095.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_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 5284 bytes
SHA-256: 24d52980cb71bfdd39ae9669ec73221a3ef675fe96738585e3c687975e1ebb97
font_01_sfnt_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 10872 bytes
SHA-256: f34bf71a5e74ffdc75b6f540d4d14283b8a2822232547797463c7f882eb0008d

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