Malicious PDF — malware analysis report

Static analysis result for SHA-256 51687c80ae5e311e…

MALICIOUS

PDF

71.9 KB Created: 2021-02-28 13:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 205801a5bef644712304345c7ea88225 SHA-1: d26f1626f63b5c5678bdf45431eb86531494c51d SHA-256: 51687c80ae5e311ed6d557e7f2faa0724ccd7bb1d9420de65f539dcf09d04f9b
136 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/award?keyword=how+to+use+hoover+steamvac+deluxe PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411503/normal_5ff1cd7fbf97c.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/parinuxabaxowi.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/jumozorofivuropoxepike.pdfIn PDF document text
    • http://tasimidu.iblogger.org/nice_guidelines_depression_child.pdfIn PDF document text
    • http://palejep.22web.org/77466400529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_6005a71b64897.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/reading_log_template_for_elementary_school.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/ninasivol/unstinted_performance_meaning.pdfIn PDF document text
    • http://pomezup.epizy.com/48384047290.pdfIn PDF document text
    • http://dapomajaberi.epizy.com/example_of_application_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/bejikukeruvepekib.pdfIn PDF document text
    • http://zukanimi.epizy.com/biology_notes_class_11.pdfIn PDF document text
    • http://rimamosapike.epizy.com/frozen_hot_chocolate_dunkin_donuts_carbs.pdfIn PDF document text
    • http://bobupugarini.epizy.com/barcode_attendance_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/tinavatesodokogufa.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/jasper_reports_parameter_queries.pdfIn PDF document text
    • http://zefofipavefo.rf.gd/upfront_magazine_answer_key_is_big_tech_too_powerful.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/60167203601.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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 5360 bytes
SHA-256: 680380150f5ee6cbe317a419dcb4ca6f8f2d655b90a0beb1db63db34f48721da
font_01_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 10456 bytes
SHA-256: affd68b3bc7ff53663ec2b4475b895ed852a02ba17056a03e01b15d85feb1658