Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a83baa693033e63…

MALICIOUS

PDF

68.3 KB Created: 2021-02-05 08:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c30ae7056a25df0d723b539037ad95e4 SHA-1: 92a236a23e7f28755aa43cd93c19f04e0dcdfb9a SHA-256: 1a83baa693033e63463b87afe8b85aa7db7ce1e376cb535de1f1a97c3cbf0a1b
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://jottigo.ru/wb?keyword=chicagoans%20guide%20to%20new%20york PDF link annotation
    • https://puruvafapazono.weebly.com/uploads/1/3/0/8/130815059/keguwubixetig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff45f48f171b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_6011fcd888774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483337/normal_5fde17bb811ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5ffa6fe2c6d11.pdfIn PDF document text
    • https://serutoposax.weebly.com/uploads/1/3/5/3/135398922/domobugizaxeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5fe6331411646.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/fajetufekejo/autocad_3d_max_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/consecuencias_de_las_reformas_borbonicas_politicas.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/hangout_app_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/23510350194.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/corporate_financial_reporting_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/konuwimafetusofali.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/vuzojogumad.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/94143524152.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_off0000cc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0F 5332 bytes
SHA-256: 67d227cbd070209f8208bd500b2ef09c2e69390d73cf7b2daea0ff6c8a90a66f
font_01_sfnt_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 11272 bytes
SHA-256: bdde9f337a11f8aba3e8bf21d0b1deefaa9b4d20934471f846794155168776c1