Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac46f47cf4b8cd78…

MALICIOUS

PDF

73.7 KB Created: 2021-02-19 20:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cab88532cea3fe2763bf57b941e071b0 SHA-1: 7674e0e2a4c95a3052c23de2b8860f5bbaf5dcbe SHA-256: ac46f47cf4b8cd7856985ef851fa8eb0268b1468e8b789cb51fcee58a7185717
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=composition+in+photography+for+beginners In PDF document text
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/gawekemomirase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5fee375ad3fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_600c96d630779.pdfIn PDF document text
    • https://rovepegolotiru.weebly.com/uploads/1/3/4/3/134319415/jajubaziguverujan.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/5HgdhgB/sitozusoravubu.pdfIn PDF document text
    • https://zosagejezigim.weebly.com/uploads/1/3/4/7/134709887/dojekobibom-zovojobat-lijowajigil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_6006220b34471.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/megodipewukitoj/tafuleruzafovukixibet.pdfIn PDF document text
    • http://dinixikidimed.epizy.com/annual_credit_report_request_service_atlanta_ga.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/insect_science_author_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/jasper_report_subreport_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/guidelines_for_htn_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/sonic_all_stars_racing_transformed_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/65684890085.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/homographs_worksheets_for_2nd_grade.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_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 5428 bytes
SHA-256: 5e280d904269f8d3330948ff25e816797600954c43bf148f283aac667913a8fb
font_01_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 10532 bytes
SHA-256: 1eadb941ac5d61d1728c837d8ba3cd0711746ce60439afb8bf5b69b1cbb41a01

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