Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cd63aee0deaee8…

MALICIOUS

PDF

152.7 KB Created: 2021-02-18 05:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f18aebbdd9aaad7bb1598f66e6632edb SHA-1: 9ace1c5baddafd892d2b82104b0f10b4ac1409c8 SHA-256: 43cd63aee0deaee83415fd33178e536c2942622079a08eaf427e218fd6c0b5a7
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://yafferge.ru/123?utm_term=should+i+learn+tai+chi+or+qigong'. ML classification also strongly indicates maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://yafferge.ru/123?utm_term=should+i+learn+tai+chi+or+qigong In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_6016eb74c4942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_601802c6254c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_5fe3908b95fd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416938/normal_60003d7a4fc82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5fcf3dcf386c2.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/fixebil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390057/normal_6008b0245543b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_602099418fb02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_6008189baac98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_602a2abb5afb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5fdf2598112d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393626/normal_6003b1ceb38cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6020fd7567775.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/2306034.pdfIn PDF document text
    • https://pobikutilun.weebly.com/uploads/1/3/4/8/134871216/86186.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafiwogi.rf.gd/family_history_of_breast_cancer_nice_guidelines.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_off00019b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B30 41156 bytes
SHA-256: ec609203e15d68d8c363c406c4ebe5b30a7bf1ec8080bfc30bdc598392ca89c5
font_01_sfnt_off00021780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21780 5252 bytes
SHA-256: d5d8707338900cb29c17651dcebefc57ce5d292d3ef2bfb88e30c1f7b5aed0cc
font_02_sfnt_off00022949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22949 15092 bytes
SHA-256: e43c967f00717f6fe160c7c2d99726f183f076b46d25cdbee8ac4488a5b11e7a

Open this report in the interactive analyzer, or submit your own file for analysis.