Malicious PDF — malware analysis report

Static analysis result for SHA-256 c213c4415728055c…

MALICIOUS

PDF

86.3 KB Created: 2020-11-16 13:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9dcaed031e481f8384bbf43a98bb6372 SHA-1: bb916f57f9feb7624c74f20d9b82c69a7d4300f3 SHA-256: c213c4415728055c28622ca1bc555a373fb5c451bc8d9ae104d2dcd64522b11f
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://ggtraff.ru/strik?utm_term=problemas+de+regla+de+tres+pdf'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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://ggtraff.ru/strik?utm_term=problemas+de+regla+de+tres+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5fa042e173cc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f96c6411ab95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5fa8974e4e6ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5fa0975a28e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_5f9da9e0dde48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411501/normal_5f9d637d9c403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_5f8c2487a0d8a.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/68d32bd9-f494-4aa0-be1c-618217653e7c/33263920903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a495c1-9dd8-4f19-8526-40e2bd55a38c/93066074233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e41565-d2f6-435d-97f1-e3cf1074118c/roluxumedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4eecb84-dfa5-43b4-8747-cbb9c43c313c/97327924332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6865c964-b86b-47db-a7c1-6ab53a986baf/19291218514.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/phrase_wheel_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/50497211893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159431c7-302b-405c-9d80-9439258988c0/jolelugimudimowogiguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a8b331-a56f-4487-84e7-ee11afa7c187/aloha_elementary_school_lakewood_ca.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_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 5504 bytes
SHA-256: 313f823e8357739b73b96247da7543563f85e5aa4b67fcb6a3ede0854c4c4be3
font_01_sfnt_off000125a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A4 11396 bytes
SHA-256: cc61845b5677134cb3406aad848d0004cffc673e15a811caa9f5f8fa67019282

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