Malicious PDF — malware analysis report

Static analysis result for SHA-256 1352f21057cb588f…

MALICIOUS

PDF

68.1 KB Created: 2021-02-14 21:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4d1732765a63af3426f13f1c45bf9297 SHA-1: d0f170bf7745f4e4b09b31c0e9da3c614cd7316d SHA-256: 1352f21057cb588f2803b736833d5c09feb29cf89031b5bc6f5e7d06c8d29d83
196 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
  • 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.
  • 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://druttle.ru/wix?keyword=lesson+5.3+practice+a+geometry+answers PDF link annotation
    • http://leopards.space/tikazuweliwazet1jjit.pdfIn PDF document text
    • https://segurabo.weebly.com/uploads/1/3/5/9/135964373/tenatutusovomuso.pdfIn PDF document text
    • http://hh666o.site/56973839812y2zg9.pdfIn PDF document text
    • http://rent-nout.site/sufidavinemugunosd8326.pdfIn PDF document text
    • http://alluniversity.fun/experience_certificate_format_for_data_entry_operatorqp7m3.pdfIn PDF document text
    • https://lamuwibosuzo.weebly.com/uploads/1/3/1/0/131071033/2487519.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/paxewevonadan_puvotuzenufe_notafudifizitun_paxituma.pdfIn PDF document text
    • http://llloooodddd.space/zelda_twilight_princess_dolphin_download77n5n.pdfIn PDF document text
    • http://italywow.pro/prognosis_asthmawks6y.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/tamobalasu/abhinetri_2_telugu_movie_movierulz.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/18325655074.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/periodic_labour_force_survey_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/foxboro_reporter_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/free_graphic_design_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/psychology_of_color_in_architecture.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_off0000ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 5676 bytes
SHA-256: b37108a3b29be2864ccdee6895eeb05cb9dd74b2029c8c3de5cf3023a915be6a
font_01_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 9772 bytes
SHA-256: db38a71580e2aa7d66615302bfc87156ab7322c16c1ceb4fe00547f7def3ac7b