Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1982742c205c724…

MALICIOUS

PDF

75.3 KB Created: 2021-02-08 23:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 27e4e1d579f568b65c6d0d6a786f9c3f SHA-1: f0c1dca766ba95f849ce2e32429ac0ecfe4d6a5c SHA-256: d1982742c205c7241618c70dabd694c11775b08c5b60f71edfc11faa92736fc1
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://baarspo.ru/aws?utm_term=leonard+cohen+sheet+music+hallelujah PDF link annotation
    • http://alisabor.design/bppv_exercises_spanishx9gp8.pdfIn PDF document text
    • http://menbp.online/journal_of_immunology_brief_reportsg3an.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5fc659d61778b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5fe01989373e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486193/normal_5fcf85816de95.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/bYdhd3G/nukugipobemeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_601937e10f7d3.pdfIn PDF document text
    • http://save50.pro/85671709299gy1pv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422914/normal_5ffd5420cb3b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5ff9c5eada7e5.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/revitakulizagi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/xjjiih3/xisadivesinu.pdfIn PDF document text
    • http://probkin34.xyz/apc_back-_ups_pro_1000va_ups_manualysp3i.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/fifRl8V/five_below_locations_new_jersey.pdfIn PDF document text
    • http://xteenware.online/27277347719mxdfl.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_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 5196 bytes
SHA-256: f4fd13ad914e50ca96a29952d0a1009c883b7981d6773222e972f418d9378a00
font_01_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 10916 bytes
SHA-256: 122665214949db98b1a3156ea0ab2adfcbac5cb1a46a9438312d23a368fc47cf