Malicious PDF — malware analysis report

Static analysis result for SHA-256 550f3bf472f85634…

MALICIOUS

PDF

68.7 KB Created: 2021-02-28 09:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a3f8332d6488312c3b03a75867012ec1 SHA-1: 8f1bd5ff952215ae45c4efa625e7b464d5c8a433 SHA-256: 550f3bf472f8563453051f3e1481c96bf991759699290ccae33c0eb5f189f648
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://pelibifir.ru/wix?keyword=google+forms+tutorial+youtube PDF link annotation
    • http://fagumawegoleleb.mypressonline.com/journal_entries_questions_for_class_11_with_solutions_in_hindi.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rain_dial_rd_600_manual.pdfIn PDF document text
    • https://wajativakol.weebly.com/uploads/1/3/4/7/134749030/1477923.pdfIn PDF document text
    • https://ragurukenawuxif.weebly.com/uploads/1/3/4/6/134667210/rigivigapavejejeromo.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/what_to_do_when_vtech_phone_says_no_line.pdfIn PDF document text
    • http://kibixus.iblogger.org/different_versions_of_the_3_little_pigs.pdfIn PDF document text
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/levaboj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosirizowu.rf.gd/24633174459.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/57739700309.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/jaxaferezose.pdfIn PDF document text
    • http://defasawune.epizy.com/45533030518.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/womigigibapezuvofopuv.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/canadian_international_school_tokyo_uniform.pdfIn PDF document text
    • http://wikatefa.epizy.com/guwomul.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/formal_email_example_cambridge.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/keto_breakfast_menu.pdfIn PDF document text
    • http://vatapusaf.rf.gd/zefiju.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_off0000d03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 5360 bytes
SHA-256: b54e074ada33066ca28d7a567a1e3b2899916ee9afa8e74572c7b7ce32ffce7c
font_01_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 10392 bytes
SHA-256: 6c37afdb9e20754a62e381699dd7117ff00199d5e46be5d117263c1036c68e65