Malicious PDF — malware analysis report

Static analysis result for SHA-256 531999b96d487b9e…

MALICIOUS

PDF

70.6 KB Created: 2021-02-22 18:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 962760c7e337c523913aa7ee9cfd12a9 SHA-1: 7d48ce75547615c21a1167527da39bcc64131a1f SHA-256: 531999b96d487b9eaee38cbf276b0734278b6f204f1df116edeb4cd6aed3dec4
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://seumenha.ru/wix?keyword=the+mayans+environment PDF link annotation
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/0be3c1b29.pdfIn PDF document text
    • http://kernig.store/writing_idiomatic_pythonutona.pdfIn PDF document text
    • http://redirunna.xyz/80659454119kko05.pdfIn PDF document text
    • http://muldwych.com/all_information_about_cricket_game2k8wk.pdfIn PDF document text
    • http://smartycredit.info/49547277583cwwb2.pdfIn PDF document text
    • http://pannochki-art.com/46164994711dcd0u.pdfIn PDF document text
    • http://onlinekartiadesi.com/definicion_de_objetivo_segun_autoressi1s0.pdfIn PDF document text
    • https://xitetufiwirisax.weebly.com/uploads/1/3/4/0/134041449/9116253.pdfIn PDF document text
    • http://aycotoro0.xyz/blues_guitar_scales_in_gogz93.pdfIn PDF document text
    • http://lishop.site/vogadunitetifexujobewuxfp9f.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/saromelikitikefu.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/xulepiwa/pomedilolesuxat.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/51473339463.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/retebutivuper.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/appraisal_form_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/feliz_navidad_lyrics_in_english_only.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/contract_termination_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/doa_sesudah_membaca_surat_yasin.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_off0000d945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD945 5004 bytes
SHA-256: f78be7f7344425573a92ea539fca2eec703f57456b5a8ccd228b55ad7454f6cd
font_01_sfnt_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 10436 bytes
SHA-256: dfda428615abfa001597cf55d5c35c3f48ac6d1ef9b3d1fe446349b52944f16b

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