Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa596a156151a7e…

MALICIOUS

PDF

68.7 KB Created: 2020-12-16 02:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 05c6067e45b9506b89f88f5baded71ec SHA-1: 93232fc4ff8370703c55bf11436ce2988569424b SHA-256: 4fa596a156151a7e81f0301f9ba12e80c449019eba95bf8723c5b1aa63bcdcc3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=journal+of+animal+ecology+awaiting+recommendation'. This URL is likely used to phish for user credentials or download additional malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=journal+of+animal+ecology+awaiting+recommendation In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_5fca4814ba81c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_5fb25dae2e226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5fa79ed9e3255.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/wupixufekijax/lumbar_spine_mri_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/bangla_tv_serial_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/zepumu.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/spell_to_make_someone_want_you.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/the_story_of_kullervo.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/19316436105.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce8c8ff01e320f3ab026ba/t/5fd16111b1f6926771495c15/1607557393627/goalkeeper_blitzcrank_skin.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/fudaxefezemejapotupisow.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/face_recognition_aadhar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cc5f81c9a2a0c98606b/1606372550396/peliculas_de_las_gemelas_olsen_en_orden.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_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 5348 bytes
SHA-256: c6c5890f423ffcd199282e01607dda28c78fb44f72697f6c744a1f3b5a81f756
font_01_sfnt_off0000e474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE474 9832 bytes
SHA-256: 91051834dda76bfcfe86fe00a572f1f5cae89ed8dafdd6f0110d4f6747051b6b

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