Malicious PDF — malware analysis report

Static analysis result for SHA-256 218808ef73b36636…

MALICIOUS

PDF

81.8 KB Created: 2021-02-13 06:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 09fc06a02ca108b03f1af006309deb07 SHA-1: 33bcac4e567250f3e0ceec44e80fcee2edf684e9 SHA-256: 218808ef73b366360bdfb199365c8e38c9761300ea1deec1eb1f3817af802a8a
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://seumenha.ru/wix?keyword=civ+5+babylon+science+victory+guide PDF link annotation
    • https://cdn.sqhk.co/pizokifuxe/jiijd3I/86910382388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5fc6bb183bcb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_601031ac4f1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_5fdaea1143422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_600e2dbe8a83a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_6019237a7951e.pdfIn PDF document text
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/6722422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fcd9a7be74be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_602240d2c1fde.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/dx3ihSn/how_can_you_diagnose_high_blood_pressure.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/temiru.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/kopisigapub/b_s_shah_account_books.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/cashback_hollywood_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/jinja2_template_flask.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/fpurx_fund_fact_sheet.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_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 5440 bytes
SHA-256: 39f410ed9e81dc40acf3ced193227461512b264ef2c6f1692bdc6e9c9d4661af
font_01_sfnt_off00011712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11712 10288 bytes
SHA-256: 42349f352939e9459b1815ac7c54e853c2ad07f93faa96e93561b2200a5ff2ff