Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b2ae975a913824…

MALICIOUS

PDF

71.0 KB Created: 2021-02-19 01:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48dafc8cb552ab21a1a449bbb564a688 SHA-1: 4aac116d160d8d2386c301969741c84f014811e8 SHA-256: 71b2ae975a913824ae223e5fd3ce44e26f67c0b4fc02957db43bf09977ef3480
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://jottigo.ru/wix?keyword=chapter+6+the+periodic+table+core+teaching+resources+answer+key PDF link annotation
    • http://podarokinsta.online/how_to_end_an_affair_nicelykip6j.pdfIn PDF document text
    • https://xunaliniwer.weebly.com/uploads/1/3/1/3/131398540/gewagivo.pdfIn PDF document text
    • http://kozovuxe.22web.org/50821710157.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/1510683.pdfIn PDF document text
    • http://tadaziwazifumiw.iblogger.org/reporting_feature_in_sharepoint_online.pdfIn PDF document text
    • https://mudabomem.weebly.com/uploads/1/3/0/9/130969182/0429b395b.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/36439908181n6s6n.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/pavujiniz/best_camera_lens_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/pl_sql_developer_datetime_format.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/77041811201.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/imo_messenger_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/ipcc_report_2018_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/the_scarlet_ibis_reading_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/majesew.pdfIn PDF document text
    • http://dimexibagumaza.epizy.com/capacity_planning_worksheet_for_scrum_teams.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/68951740706.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_off0000d73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73B 5792 bytes
SHA-256: e65ba20042c9e358b08435dd150983c119014c857f314850a33c5897cbf05933
font_01_sfnt_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 10436 bytes
SHA-256: 16f090aeba8dc484bd92102cea92e49ba24e1eea66e9981b08809908db06a8c5

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