Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43d416421e1010c…

MALICIOUS

PDF

63.6 KB Created: 2021-02-26 08:25:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1c0d7934eef1416eb111509174dbd815 SHA-1: 46ff26678e90fd75ea6781504918eedaa017da6e SHA-256: c43d416421e1010cfef7df301c743e327eb8e7984282dfb4fdd7e56996f2eb88
196 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
  • 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.
  • 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/award?keyword=genesis+32+27-28+esv PDF link annotation
    • http://netusikofigo.22web.org/free_printable_habit_tracker_sheets.pdfIn PDF document text
    • http://gikodipimobu.iblogger.org/what_is_the_science_of_unitary_human_beings.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fd04a8dc55ab.pdfIn PDF document text
    • https://lezanaxowap.weebly.com/uploads/1/3/2/6/132696506/lomin-gexofizibajo-tomivigoxisej-rudugivixizuzir.pdfIn PDF document text
    • http://kipuleli.iblogger.org/94895420532.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/bgd9ehe/wofatefemesul.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/gdjfhiA/40079447522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_600473c36c26e.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/jbRgijg/lisa_dentist_simpsons.pdfIn PDF document text
    • https://rurezakofone.weebly.com/uploads/1/3/1/1/131163981/jibamubafen_kuravenilom.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/lofese/62191776696.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/12537517622.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/ielts_reading_test_doctoring_sales_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/gettysburg_movie_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_off0000be8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8E 5032 bytes
SHA-256: e6150032bb439875a0efca24cc7721cc45cf752633f6a8eefe3368a006f16b8f
font_01_sfnt_off0000cfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDF 9916 bytes
SHA-256: 201e1c0547fd45f217d7c4142fe5a4bb0539d4e501d6b479d887e20322bdd202