Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c5aa01858ffa47…

MALICIOUS

PDF

65.5 KB Created: 2020-11-21 17:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 488bcb824a9c9738fad9af5f36e4076f SHA-1: 741621e9abb3196143c86a6c681bc5a070f4b07f SHA-256: 27c5aa01858ffa47cf8f78432246f716380ac6cf8a75784f1bdb4db5d411a9db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing a link to a known malicious redirector. The ML classifier and ClamAV also flagged it as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or a download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=mexican+hat+dance+for+kids In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5fb5c6ece2e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5f914e8e005ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fa737ac1023f.pdfIn PDF document text
    • https://gifidutuv.weebly.com/uploads/1/3/4/6/134666467/fiwuwidazexazasozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_5fb2f4058f40e.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/tuzoginamugu_gurapuluwisage_bosozelesesexe_nuxodefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_5fa8e41241701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fb6e14a1f971.pdfIn PDF document text
    • https://wuserugojikenek.weebly.com/uploads/1/3/4/5/134513610/bebufidizu.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/najubu/dictionary_of_public_administration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9ddeee-38e7-4880-969d-f10b64c0b4b1/schenectady_county_clerk_office_pistol_permit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d07650-4d51-4f3e-8b8f-19acf6baa8e3/thirteen_reasons_why_read_online.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_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 5212 bytes
SHA-256: 3dc91f9afd0ce4d2114223ec20f6b23b1d28599261d9d8096f13a3c90ec3e052
font_01_sfnt_off0000da2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2E 9236 bytes
SHA-256: d79c820a8dc58f223979ebf242d141a7a0f0aa1dfe44a9ead450e17934ce5910