Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bf126bb806428d…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 18:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d0374db0bdb7f6dfa713fb928703f773 SHA-1: 03852220e9f92f6e4d4024f7b22907f8e6854b9c SHA-256: 52bf126bb806428d7bd0e8ff5cf1d5684023af8fab5c1a184478639bd358e617
194 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
  • 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=pathfinder+adventures+obsidian+edition In PDF document text
    • https://static.s123-cdn-static.com/uploads/4425005/normal_5ff62048e968c.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/27505822441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388178/normal_5fec86274b12e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470839/normal_5ff00f1915001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5fe2441f197f3.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/the_curse_of_strahd_ddo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470961/normal_5fcf665fd788c.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/sumipizowukalomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_6020398954651.pdfIn PDF document text
    • http://vsspb.ru/substitution_method_systems_of_equations_worksheetr8l0z.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/badlands_movie_2019_reviewfwv86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5fca7b37a87dc.pdfIn PDF document text
    • http://teren.fun/myconcordia_student_email2u9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_60247cbb5dae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5ff7bd002ca8e.pdfIn PDF document text
    • http://thrivewebs.com/telecharger_lokicraft_pccfd95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_5fe903dbbf057.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/jefobexapulow/vocabulary_words_for_cat.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/career_path_financial_reporting_analyst.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/wofokezixivejigobogamafaf.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/alpari_demo_account.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_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 5164 bytes
SHA-256: bf3a6bf443dad6ac958fe4f353630fa61bf069e8b5d117b4ec747e7ef40b07c7
font_01_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 10660 bytes
SHA-256: b3ff96aeebfe3a5558a130c33da73a4cac438ca0e34c0045dc437e2b8790dffc