Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d0761925c64997…

MALICIOUS

PDF

63.6 KB Created: 2020-11-13 06:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2878f069109efafa0fc7193b2f3ff5a4 SHA-1: 318469bf976caf3c8b2fa52ea30685df8c2ac24e SHA-256: c2d0761925c64997333af4cb9699ec6bb38be61794f1778622c4397426988030
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=format+surat+lamaran+kerja.doc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f93f7ced16b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_5fab536da2c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f88c354b1453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_5fa81fad26502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f96f6b8d477b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8f1a3e4777b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8f01ee9c110.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b51fc7e-7044-4866-afe1-9aa53dc36a82/25575428386.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/oates_specialties_shoulder_tube.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/modded_clash_royale_servers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708d1eb9-39e1-4a7a-8639-c5761e746901/92434581825.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/22468654068.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/4005188000.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/ribubi.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_off0000bbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD3 5212 bytes
SHA-256: b927da0cc2d97f5e7c1c790f099d72f3d7c4ba531619cf7844fe3324c9f9ede3
font_01_sfnt_off0000cd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7D 10600 bytes
SHA-256: c14567c6b14b134ccfb95b2ba8540d81a611e02bb15630a5902ae21aa0733157