Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffe1e5e84a40d93…

MALICIOUS

PDF

74.7 KB Created: 2020-12-29 21:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 604893cd0941e32c268c09f97a3e400d SHA-1: cc9decd185d138597464b9af5c67a3ba8b9d2c9c SHA-256: 7ffe1e5e84a40d93bddb84dcfba550ffd94fd48a88e4e8a71c9514dbd66a7c88
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to external PDF documents, a technique often used for SEO manipulation or to host phishing content. One of the primary links directs to a known malicious redirector, indicating a high likelihood of malicious intent. The ClamAV detection and ML classifier further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=bullet+shoot+3d+printer In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380413/normal_5fdd273df3c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f870352bc8cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5fe7eaa8c3fb8.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/8gegcia/xesexisigefuzomaxuxolole.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/pKVCIhi/love_u_husband_quotes_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5fc1864c30f65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368266/normal_5fc7650869cf5.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/jfjjejz/11077596867.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/MjdWqjf/50614435296.pdfIn PDF document text
    • https://mumevifovamix.weebly.com/uploads/1/3/4/4/134486033/moxolorelotunazij.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/liguwubore/vawum.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/online_first_investigation_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/52634950268.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/latter_former_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/61636435524.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/anjocaido_minecraft_1.8.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_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 5048 bytes
SHA-256: 3206c6d87b7fd5d680f6656eadc06e41267f873a94cba3d71a53fcb0cfc77343
font_01_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 10780 bytes
SHA-256: 0f4879456db5de1196215be04c0a3550561bc3b9792bcde58b8e9d9dbfeb583c

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