Malicious PDF — malware analysis report

Static analysis result for SHA-256 509a92f914f8d22e…

MALICIOUS

PDF

71.3 KB Created: 2021-03-01 18:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 45314505c03ac5f19b643707311d7df2 SHA-1: 0cb1a32e13aeaf0c0a2210eeed89555877ee9f53 SHA-256: 509a92f914f8d22e46c4817e36055e732765bdf31d2980817623ea0ac52dd1c3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wb?keyword=briggs%20and%20stratton%20engines%20for%20sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414334/normal_60166bf1ed6ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_60265bcd1f028.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/iejihcE/23445190125.pdfIn PDF document text
    • http://limevekobo.iblogger.org/sarusidibokifuliwibomiro.pdfIn PDF document text
    • http://fosinofabeveso.22web.org/20542014483.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/math_estimation_worksheets_grade_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5fdc2be16a537.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/9gh5sqp/47681921575.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/hejalIl/aeries_portal_sbcusd_parent_portal_login_page.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/56TrWfl/vixemogirubazoboxab.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/zamemigojat/fopugisiniditelarosevij.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/applesauce_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/43724996154.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/sadlier_vocabulary_workshop_level_e_unit_5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/how_to_explain_ratio_analysis.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_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 5124 bytes
SHA-256: b408b6c2c84638e8b84c7241729233a7e996ad60b7e481e48efe6a987369629b
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 10216 bytes
SHA-256: 7b7a1ef7b5462c7f2fb29c76c9c03bc2eea75a0cc931eb7ad6f1e6263b2f3706