Malicious PDF — malware analysis report

Static analysis result for SHA-256 397091566c99aea1…

MALICIOUS

PDF

65.7 KB Created: 2021-02-20 13:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e76581b34fbdb264e7a55cfcb3ec1e1a SHA-1: 0fa6621d1dd69c6f9e805dcd11a4864d07e60c5f SHA-256: 397091566c99aea1cbbbf74dfd6e5864168097d04385e131df0c6401ce76d684
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=google+site+games+slope In PDF document text
    • https://pafutidosuzov.weebly.com/uploads/1/3/5/9/135989867/2561853.pdfIn PDF document text
    • http://itgermany.net/zombie_hunter_airsoft_pistol7nxwt.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/mejados/tezofibap.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/bee_flower_picture_94_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/kendo_editor_template_checkbox.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/lumipasekojetokatewad.pdfIn PDF document text
    • http://sezajuvijib.rf.gd/79423515064.pdfIn PDF document text
    • http://vipowiso.epizy.com/lavonagigutolixojo.pdfIn PDF document text
    • http://kokiralasido.epizy.com/89777685264.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/powerpoint_templates_trackid_sp-_006.pdfIn PDF document text
    • http://vixabediwudofi.epizy.com/73719977499.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/the_bfg_movie_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/android_studio_ambiguous_method_call_findviewbyid.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/chemistry_background_ppt_free.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/34112808207.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_off0000c607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC607 5076 bytes
SHA-256: 09d040f319065adcee366647c700968f050a2db83bb22d122e377423b657aada
font_01_sfnt_off0000d745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD745 10264 bytes
SHA-256: f91acb84530e5f62bbf861293c08e0ce294d59c5a3b55bc9850b96b983c56848