Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb26d7b65525d64…

MALICIOUS

PDF

62.2 KB Created: 2020-12-16 16:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ff3404e2652eab82fee492f258db5871 SHA-1: a7c5b6afdc71bc8ca98a339c5cccb9b5636d3dbc SHA-256: feb26d7b65525d6429833589fab62996d9943e2131b88578728cd64f3d25466f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it redirects to known malicious infrastructure. The embedded URL 'https://traffking.ru/123?utm_term=brebeuf+hockey+schedule' is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent.

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://traffking.ru/123?utm_term=brebeuf+hockey+schedule In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5fb71eec76ee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f976e34d3dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5fb8326dbeb42.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/d3a7ff.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/pegebunov/73574480570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1635b294-8471-4655-a9dc-abbd66f8f9dc/2113544481.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/topujekolukovovesagezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b18e22-2f3b-4809-adaf-b968c44ff1f7/d_pryde_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04cb0a5-b63b-433e-bae4-98101c3694a0/91782545920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082bba9b-a14e-42b6-8849-1faf0e2f3712/98793578263.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/78303955047.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_off0000b7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EF 5256 bytes
SHA-256: 3340a73ac885f86ddf73c8dc02ab15fe635406cc827982b98997c348fb3fd3a0
font_01_sfnt_off0000c9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D4 10148 bytes
SHA-256: 3f002bdb6b48bbb098ad607c229b7d9151f93a1db2f8a88170e1006fd7341ad0