Malicious PDF — malware analysis report

Static analysis result for SHA-256 623a577a57309ded…

MALICIOUS

PDF

87.1 KB Created: 2021-02-28 19:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 38804412b6f4f6b614ae175ca69acd8a SHA-1: f3a2dc8a94c7df699d0611282ba0f7b9d198e9fc SHA-256: 623a577a57309ded0a46358b33f765676746ba35f40a8a427d2a2d1f07fc54a8
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=jack+reacher+full+movie+tom+cruise PDF link annotation
    • http://apsdd54gfv.xyz/fruit_of_grisaia_steam_patchlf3ft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_601359b1e83e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_602dcfd2a6a39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fc7f3266be45.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/78744639328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6030715223c0f.pdfIn PDF document text
    • http://skywonder.space/reproductive_system_organs_worksheet5xhvp.pdfIn PDF document text
    • http://lofamixif.22web.org/63050424942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378843/normal_5fdd5ca1e880f.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/setikizo/bronze_age_civilization-_egypt.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/yard_machines_by_mtd_snowblower_how_to_start.pdfIn PDF document text
    • http://kodugexibitomo.rf.gd/28637667925.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/tokaxivot.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/renupofesinujubuval.pdfIn PDF document text
    • http://muwaziri.epizy.com/fur_alina_sheet_music.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_off00011592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11592 5236 bytes
SHA-256: 68644a09051ff21c1ee7a84ae7bdf0e5c3b852256f8fbba5ee1000a2eb8bda52
font_01_sfnt_off00012745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12745 12116 bytes
SHA-256: d8adff1701004ae2d9cce10f4179b1b19574df74b8409ded655a5e67a0714d47