Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e435728eeccca5…

MALICIOUS

PDF

75.3 KB Created: 2021-02-18 05:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: db2f3f48293370ff8553b38916f84252 SHA-1: 20fa0d408815649583cba2717a6fcf8779f620a2 SHA-256: 63e435728eeccca5ccad6ff42858ebde8801fe9d9a55e23f025c6129f1f896f7
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/wb?keyword=what%20are%20the%20different%20types%20of%20financial%20models PDF link annotation
    • http://reduslim-shop.website/hindi_alphabet_worksheetszybo1.pdfIn PDF document text
    • http://iminn.ru/because_he_lives_hymn_lyricskj41m.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/hejaWi3/ikea_dresser_hemnes_white.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/995b4cdfcd.pdfIn PDF document text
    • http://creditactive.info/37966442313vmxqm.pdfIn PDF document text
    • https://cdn.sqhk.co/semobisugigi/jbwjgq7/36458954478.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/tibeturosokebepona.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/bgjhVjj/girl_next_door_saving_jane.pdfIn PDF document text
    • https://cdn.sqhk.co/kilatelazobe/jcDgiiZ/93915786216.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/veEX5hd/hide_and_seek_calgary_netflix_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/rrp4Ogd/driving_school_management_system_project_report.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/g70OhbC/67902861202.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafuzivega/dLifmih/sixopiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/zjfh9ia/paper_shredding_machine_price_in_delhi.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/zonanivebojazoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5508 bytes
SHA-256: 794ec5bd0a08acfe816dfdb4ffbb3185ef53487b21a04413fbbef539c736e252
font_01_sfnt_off0000fcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 10372 bytes
SHA-256: 3d9d6a7ee370c1b443cb34a30723fc42997590c70127e1c0ee3c10a00dcf4392