Malicious PDF — malware analysis report

Static analysis result for SHA-256 e391e7109d4583b6…

MALICIOUS

PDF

93.0 KB Created: 2020-12-20 04:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 797fe49b38210342f2dc99b67fc18eb5 SHA-1: d43a410b253ab72b39494d2cea2e50c1f81fb9a7 SHA-256: e391e7109d4583b6e950529fb471aa1cd0ac95a0bdb1d4402bd152420b562113
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://traffking.ru/strik?utm_term=massa+de+pizza+facil'. This indicates the document's primary purpose is to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious URLs suggests an attempt to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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://traffking.ru/strik?utm_term=massa+de+pizza+facil In PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/c2f685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420776/normal_5fd03ac5ef116.pdfIn PDF document text
    • https://selilanabos.weebly.com/uploads/1/3/4/8/134875664/1223221.pdfIn PDF document text
    • https://setekonireza.weebly.com/uploads/1/3/4/1/134131298/eb0b90.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/5fc5a090405d5340f349e1df/t/5fcb549d9cf56e0e8b0fcace/1607160990667/52272925078.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/baras_baras_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/aristoteles_filosofia.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/gexewibelupeno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 26976 bytes
SHA-256: a75b35992a729e0d433610283bdaee47cd25a163992a3fc530a78c7e98d02172
font_01_sfnt_off00012c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3C 5108 bytes
SHA-256: 259fcb24095d7992e8c00a64445606f46927fc43f73245276650fb3de1fda072
font_02_sfnt_off00013dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCE 13344 bytes
SHA-256: cacc053cba78b662940837a531a72b26e25e8cc5974ecd009b655fb81d96c7d1