Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aeef6969c082c88…

MALICIOUS

PDF

72.3 KB Created: 2021-02-18 18:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 22ac374faa41d6172d878773d4469478 SHA-1: e0775640b2b09d2c95c9e4ead9a71e0463ffddea SHA-256: 7aeef6969c082c8830949ac160ec6f9fa352ea70b765387cc1e5fb9a679f0866
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=illustrator+pen+tool+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448113/normal_600136537ece7.pdfIn PDF document text
    • https://xerupirep.weebly.com/uploads/1/3/1/4/131408033/pelerivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcf7541007e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ff9ee7ece1e1.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/nivixikut-nogofisude-maruseju.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/fe235e82dd13.pdfIn PDF document text
    • https://cdn.sqhk.co/xipovowimugo/hjwwQGt/tisuzawofej.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/y3ygjsi/how_to_iron_without_an_ironing_board.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/gisoxes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425533/normal_5ffcdae4dd78a.pdfIn PDF document text
    • https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/8945906.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/dowavelaxam/coffin_stand_crossword_answer.pdfIn PDF document text
    • http://mubadel.epizy.com/don_t_stop_believin_sheet_music_free.pdfIn PDF document text
    • http://pepuzigupa.epizy.com/cambridge_vocabulary_for_ielts_advanced_free.pdfIn PDF document text
    • http://purokamutene.rf.gd/kovaxojo.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_off0000ddc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 5152 bytes
SHA-256: f53fc170fe83d060e60ccf4b6876bb6f178f8bcc996ca0f3f32b706a99351e5a
font_01_sfnt_off0000ef64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF64 10720 bytes
SHA-256: e477a29e7fa33e585e8f52cb03a341ba19ba325b8bcb155761561ee90b2875ec