Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c19c4773b6c5b54…

MALICIOUS

PDF

64.7 KB Created: 2021-03-01 22:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0bd4f90d1636c6812dad71ae3ce4e4a0 SHA-1: d17c2d0d1c787e179eb5f629d9ea7b19adcb4f9a SHA-256: 8c19c4773b6c5b547cfe9af02758cf0bb2ece51f8e98546e55dbf799f56ad11e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=lochinvar+power+fin+boiler+manual PDF link annotation
    • https://cdn.sqhk.co/gijosevozu/Xnvjejg/dinavenorutemiwogime.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/dgfieks/jufedimegalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_601317201df6b.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/cvBtHOF/17743370308.pdfIn PDF document text
    • http://coins24h.com/nodisowuvuvudupiwenureldlmu.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/jjrkBIv/car_racing_simulator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/HKjcAlg/zuxaruwosanefidef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/hp_laserjet_p2035_printer_full_driver_download_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/interview_formal_wear.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/69438728619.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/abbyy_eformfiller_atsiusti.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/taiwan_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/basf_course_full_form.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_off0000c21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21A 5308 bytes
SHA-256: 8ab78f4d962bc53f4ba287cc99597ff716b7c26729326c4957ba257ea9816827
font_01_sfnt_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 9944 bytes
SHA-256: fe37fcfa92b80bc697a5984c9b7bc90ea07f58b3ce4c4aa5b428b3e62707cb5f