Malicious PDF — malware analysis report

Static analysis result for SHA-256 7572b1f380e25b26…

MALICIOUS

PDF

62.7 KB Created: 2021-02-11 21:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 18472723521973fe3218855d85e1c758 SHA-1: 7d9df06f138ea912d966c29683140fec65eb37aa SHA-256: 7572b1f380e25b2610b23f0bdcf313dd90d0b8dcd484d0082032d7fbd3824939
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://jacksth.ru/wix?keyword=brinkmann+electric+smoker+cooking+recipe+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410462/normal_5ff48a9696856.pdfIn PDF document text
    • https://meliwuka.weebly.com/uploads/1/3/2/7/132740471/6701202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415326/normal_6008ddf75adbf.pdfIn PDF document text
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/4623d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464067/normal_6006019c7e087.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/yie9The/trending_vidhub_trending_viral_video_apps.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/06d79e7ac3.pdfIn PDF document text
    • https://pugubitef.weebly.com/uploads/1/3/5/3/135302221/6992871.pdfIn PDF document text
    • https://semuzotefol.weebly.com/uploads/1/3/1/4/131437619/pexefek.pdfIn PDF document text
    • https://tunikasas.weebly.com/uploads/1/3/1/4/131438809/9301452.pdfIn PDF document text
    • http://scm03.ru/google_sheets_amortization_schedule_with_paydownih7dy.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/potikesax.pdfIn PDF document text
    • http://igcopyrightverify.com/muketil1fqxr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_6002ab2d8bba1.pdfIn PDF document text
    • https://sizadomuwegemos.weebly.com/uploads/1/3/5/3/135335556/jumit.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_off0000b75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB75A 5728 bytes
SHA-256: 37c56dbf1d92027507905c2ca2e92be7cf9c3f9166c5e392d5b4217d2850caa4
font_01_sfnt_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 10236 bytes
SHA-256: 8f9d24d174c80aeccff6e7a8c877dd1f247a843f90557cbb24ee9d25b18ba94a