Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62c34cbfbdfe4bc…

MALICIOUS

PDF

62.4 KB Created: 2021-02-19 02:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c129640f3b6a456cba5057d1c1922f69 SHA-1: 604ab74d71d73e77f40f7b746041704fcb8c4f19 SHA-256: d62c34cbfbdfe4bcb034be15563698d4e78a1ed23f170372ec7ed38dec994371
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=nisd+learning+tree+twitter PDF link annotation
    • http://lodixewovufosa.iblogger.org/disruptive_stabilizing_and_directional_selection_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/KJIjgGu/piturexititaram.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/hbiEq2R/shadow_demon_slayer_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/6Vhhhhh/vitamin_d_deficiency_causes_acne.pdfIn PDF document text
    • http://duperalenow.22web.org/one_direction_boyfriend_quiz_with_long_answers.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/24c3738.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/gewuwasi/50089562610.pdfIn PDF document text
    • http://mogerokefo.epizy.com/livro_minimalismo_gratis.pdfIn PDF document text
    • http://gevuragerok.epizy.com/24208630023.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/xakozo.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/above_all_power_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/difference_between_meningitis_and_encephalitis.pdfIn PDF document text
    • http://puzegekizizovin.epizy.com/komegurifopulanar.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_off0000bd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD09 5052 bytes
SHA-256: 84fd780ae3b8dbdadfcf5c113919bf98b2c0a2cc86f1bf71255651b749930059
font_01_sfnt_off0000ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 8936 bytes
SHA-256: e87233d0f826203ced2bf3eeedbc11683cd0b8a458eb4ffeeb7608e8b250e85f