Malicious PDF — malware analysis report

Static analysis result for SHA-256 57505c01cf0ac9c5…

MALICIOUS

PDF

70.7 KB Created: 2020-12-17 09:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 85852c3c6db8707ffc31c9180078251a SHA-1: e0f83f7a883bf739b076f61e2c693869508d4605 SHA-256: 57505c01cf0ac9c5797e3ab28b1c0bfc251c767b215ed529be91bb27ed26832a
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cctraff.ru/strik?utm_term=the+kill+order+summary+shmoop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_5faaf0ff39f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fc21cd9d32d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5fc897a258ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f90ace7bb421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f96d0aef21ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5fd0dc76c824b.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://uploads.strikinglycdn.com/files/0e757d22-d695-49df-a83b-e6f2255242ff/68480036397.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/47570185238.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd00fb1491241adc463f2d/1606222076265/ink_master_season_3_finale.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_off0000ccc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC1 5008 bytes
SHA-256: 301b8294f7e325f79ae56c4a738a569ca49b51482419cf85cd94274bfebda763
font_01_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 10088 bytes
SHA-256: c57f14342a1d568be5fb3ec6466ca948eab4ff553eed6c9ca49f70de5cafce5c
font_02_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e