Malicious PDF — malware analysis report

Static analysis result for SHA-256 595767094ae32ff3…

MALICIOUS

PDF

75.4 KB Created: 2021-02-24 01:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cf164c462d7a021b23d8f4d9d379aae8 SHA-1: fea657b6c3294e284238564f876cc9f656f8bf20 SHA-256: 595767094ae32ff39081c7cd1d25297bc9cc863971311d79e4c70051ca9dd4f1
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/123?utm_term=maserati+granturismo+2013+price+new In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413587/normal_5fe0c8a18b791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5ff189d3b2cfd.pdfIn PDF document text
    • https://fimopoki.weebly.com/uploads/1/3/4/0/134040487/1539691.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/self_contemplate_in_a_sentence.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463275/normal_5fe1c31c38c72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5feba0cfb8a4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5fee4bcf61772.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500897/normal_5ff5eb9f20a4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368226/normal_5ffcd6ffbebc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fcdc2305c469.pdfIn PDF document text
    • http://nujosanoze.iblogger.org/gakojumasewesogoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_602aad5cc4334.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajowisomipuw.epizy.com/95576598545.pdfIn PDF document text
    • http://nogojituwizax.epizy.com/honda_pilot_service_codes_b12.pdfIn PDF document text
    • http://gulibikamo.epizy.com/eval_closing_statement.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_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 5808 bytes
SHA-256: 869512071a424753ca6fae18c089c2d74bcc41dc0c26dfc08386b31220fc12fb
font_01_sfnt_off0000f8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A8 11756 bytes
SHA-256: 84fc14d9c0976d0458c904d2c02908d60cfc8ba89a68971d77842ee19238ea5b