Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd47b0c2f330cba0…

MALICIOUS

PDF

64.4 KB Created: 2021-01-15 11:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f01478734cfe1f3eca7cc291f24dfe04 SHA-1: b31e1f02c52e863bce735c56b4e92bae8bab3629 SHA-256: cd47b0c2f330cba0c9e516cd7b6378c55d677f0b6a0b8bd70f7de47e2a8f0730
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to be a lure related to textbook downloads, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=mcgraw+hill+abnormal+psychology+8th+edition+pdf In PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/8992814.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/62abe07e01c1.pdfIn PDF document text
    • https://cdn.sqhk.co/vozupowo/dgfiagc/celebrity_cruises_reviews_infinity.pdfIn PDF document text
    • https://site-1172403.mozfiles.com/files/1172403/91518632746.pdfIn PDF document text
    • https://site-1174029.mozfiles.com/files/1174029/fulam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_5fb2522553ff1.pdfIn PDF document text
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/9154932.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/xotomisen/91200780367.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/3rd_grade_math_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/avery_labels_18160_free_template.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_off0000be49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE49 6100 bytes
SHA-256: afd9608ea1cdd0afda1ec65d02f758246ae0f5b8edf0032043de571ddd66d1ec
font_01_sfnt_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 9856 bytes
SHA-256: 45510b6d6af905445ce829c9c9b35b75bb54f7e1f3c666ce0e27e958af5bcb33

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