Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9518afa50ead42a…

MALICIOUS

PDF

70.5 KB Created: 2021-02-12 04:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b61424ec9a8ea8054d053acff74e61d SHA-1: cf27d705e9d01eacec55264fb5a0955ff07a6766 SHA-256: a9518afa50ead42a98c5ba1887e7000cb008d1b79d76f76c66321b4c317ef6fe
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=munster+youth+basketball In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402740/normal_5fe7185b9a5d7.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/aHhieNb/weekly_ad_safeway_salem_oregon.pdfIn PDF document text
    • https://ziwivebagojub.weebly.com/uploads/1/3/1/8/131871618/tusimobewidapu_kebiruroduferu_javasemolotoz_kekoli.pdfIn PDF document text
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/lipedogibepudodefuz.pdfIn PDF document text
    • https://tiledumojamusej.weebly.com/uploads/1/3/4/0/134096308/xuxidedoxakigikas.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/7786280.pdfIn PDF document text
    • https://lujipened.weebly.com/uploads/1/3/2/7/132740552/xolaxomodamin-zelepum-wokanazi.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/ifmmhdn/fuvijuxibilomeliguruve.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/peziti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_5ffcded74a086.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jaKRL9W/25161305700.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/bopami-lemexagitobiter-jixemi-fapugejuvanor.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/kuboki/bluestacks_android_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/vogevesumo.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/44467951386.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/sample_joining_report_on_transfer.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/73669390152.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/bluestacks_3_android_emulator_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/mozifuvadoviterudigegu.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_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 5084 bytes
SHA-256: 120645339e6aefc6af543f2c03701dd950f4bce63fb9dd65075c7a19a9e08c2d
font_01_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 11052 bytes
SHA-256: c231877dd7f08ea5df419ea3171d562b0d69c904dd89508ea5331701acf0ef10

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