Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f075200c15741ed…

MALICIOUS

PDF

38.0 KB Created: 2020-11-06 19:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 466a679ed8c34f69ea56ece3cf3494ca SHA-1: f63b075635d85703f57aa55ce0a428d635ee8647 SHA-256: 9f075200c15741edee66a44444661bd47fbe786ee4a94b697148e3c247bad68c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffking.ru/aws?keyword=hard+c+and+soft+c+worksheets+for+second+grade In PDF document text
    • https://reruwezoketa.weebly.com/uploads/1/3/4/5/134503250/aa6e21c.pdfIn PDF document text
    • https://vozopameniv.weebly.com/uploads/1/3/4/5/134593493/xejowuloni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tadovu/cambridge_secondary_1_progression_test_past_papers_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/nijipufewidobivod.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/police_charger_for_sale_california.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/sample_answer_sheet_for_ielts.pdfIn PDF document text
    • https://jelapem.files.wordpress.com/2020/11/kuzirorupimepolowu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/juxezizasesofufibima.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/adobe_illustrator_mac_crack_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/68094493217.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/42855664872.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/principios_del_materialismo_historico.pdfIn PDF document text
    • https://bojowekig.files.wordpress.com/2020/11/wulefinarinuzoranosazo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/wuleguveruzeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/gigasefoliziwuvid.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/batch_production_record.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/annotates_in_zotero.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B55 5108 bytes
SHA-256: 3b9da970e75e76e12194a02dadb345b74a9d4ababc6cb7a477e042723a374bb9
font_01_sfnt_off00005cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB1 9136 bytes
SHA-256: 59cc9b55ea7bff51add5e620f10004a323031ab8628e2bc4e2da74ef33205bab
font_02_sfnt_off00007c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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