Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbddbfeb379e5b8c…

MALICIOUS

PDF

67.8 KB Created: 2020-12-17 05:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 497c1b24b376527b3f13d1f8432f4a6d SHA-1: 99e8348c08bbddd8996f6b0f4b5afa082bbf5a6b SHA-256: dbddbfeb379e5b8cb94d49e6376ea73750c493d7265f18c3ce85269f4ffb90d7
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://traffmen.ru/123?utm_term=bully+geography+5 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5fcf440adcdde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_5fd1ef484e501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366331/normal_5fcf70c867cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fa76f5e662bb.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • https://lunejuwibamir.weebly.com/uploads/1/3/4/5/134587588/e840e9e25d80c7.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/2408574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_5fa383f1425d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8cf9f5de069.pdfIn PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/3254428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc28f693dfdd95b60dfa9a7/t/5fd178ba7c12252903ea4fa2/1607563451452/26229406419.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc170ae085bf90c0e00e766/t/5fce037a7ae85b53b2b793c4/1607336849052/5913581048.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5587827a199023ad2f44a/t/5fcf9cbc8b174454e9a6bd8e/1607441597896/zibafolapawerupemaful.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc50a354f983757207de8df/1606748727148/97694675036.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ef5cbe9b69395124a64b/t/5fd6d85e5b1f6f7539e8964b/1607915616077/canteen_management_system_android_project.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_off0000cd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 5180 bytes
SHA-256: 1e8d2be5e34c2943b5545db667c7b9c0c3233d0351a131c1237092f6294e3a61
font_01_sfnt_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 10452 bytes
SHA-256: 195cdd11920e2f3234ff0e100e50ba1a09c9891067c015eaca51c73bb7da5984

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