Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a3405007a25560…

MALICIOUS

PDF

76.8 KB Created: 2021-02-17 11:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 39cce29a8b43e3a20b7a4826e78fa22f SHA-1: 8a64fcf96514c2502969bdfd3567f6fcb1e33c26 SHA-256: b0a3405007a25560c10b8e538a08e78539afeba01816a9080b7d530912524b16
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=how+to+draw+a+autumn+tree In PDF document text
    • https://cdn.sqhk.co/vovigewuva/389wyhe/19787703606.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lusegokaves/denis.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/bang_bang_jessie_j_ariana_grande.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/vivaf.pdfIn PDF document text
    • http://terajupatasan.rf.gd/1133458814.pdfIn PDF document text
    • http://vezoxonu.epizy.com/4g_speed_up_internet_lte_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/tom_white_hadoop_the_definitive_guide_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/pefikokafupogumofebob.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/forensic_audit_procedures.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/40449522029.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/developer_tab_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/71216800732.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_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 4648 bytes
SHA-256: 07879c87bb41d6ca179aedf58243625fd08e4ac61403cd699e8dbabf5cb0a480
font_01_sfnt_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 10708 bytes
SHA-256: d3929a3d2ce046d95182f9e928ba648064b5c386353c9423a30362aff37ea34d
font_02_sfnt_off00011852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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