Malicious PDF — malware analysis report

Static analysis result for SHA-256 8567faba8122bff4…

MALICIOUS

PDF

72.3 KB Created: 2021-02-25 08:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 001f79e25c3388837296ac5355d1c28e SHA-1: 4a46798f0e42571a562017b81d60df8bd019b750 SHA-256: 8567faba8122bff49d283887b0f1e2fb0e460a04834b9cfc25dafb7d18019527
194 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
  • 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.
  • 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/award?keyword=icom+706+mk2g+repair In PDF document text
    • https://static.s123-cdn-static.com/uploads/4477913/normal_60011d02d2942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373516/normal_5fe57bc0ccb18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_5fd0fd95e2de6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_6008f842dc7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_6018ddb848738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_6029a9adc57fa.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/hfijbhh/mod_among_us_always_imposter_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/Tihcphc/std_10_maths.pdfIn PDF document text
    • http://rafonuza.22web.org/shorter_catechism_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/hjjfhiX/1326498937.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/eXhdKjh/events_at_the_factory_in_franklin_tennessee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5fd99706b4f05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_6009e71223f30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476766/normal_6008a0132425d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_5fdc89632ebe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fe2603da314f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavodusepigixu.rf.gd/jegemowonatefikaz.pdfIn PDF document text
    • http://mepefixo.epizy.com/learning_korean_alphabet.pdfIn PDF document text
    • http://guwajip.epizy.com/frindle_book_online.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77C 5552 bytes
SHA-256: 0047105de03aceda252c989d382f85ace6c5070467409623049f4d34ceae0d0c
font_01_sfnt_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 10368 bytes
SHA-256: 41f5a2044fe59631fb1b8c6df8c9cad143d77e0c68eaefd02677d1e361a3104a
font_02_sfnt_off0000fe15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE15 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c

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