Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0c8a9f00d4fe05…

MALICIOUS

PDF

76.0 KB Created: 2020-11-24 01:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 757e74f505501e96d00a3e8b92926a0f SHA-1: db4aac3c2a25bff505c52be3616c73d26a3a0301 SHA-256: 6b0c8a9f00d4fe05a7db052d2c3f3b7a62399dea7a315c1e9e534857fd3166bd
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure for users to click and potentially download further malware or be phished.

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://cctraff.ru/strik?utm_term=olandsk+gallinas+de+enano In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_5fb03d2569f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8ef83020545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_5fac358e06cab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5faee38cb50cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5fa2d9743db9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f8f0843a8c20.pdfIn PDF document text
    • https://burakobid.weebly.com/uploads/1/3/4/6/134602904/b037bb41b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8a30a01b3c8.pdfIn PDF document text
    • https://paxowamowutujaf.weebly.com/uploads/1/3/4/3/134322095/7084450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fd8a88-ead7-4f6d-bd0e-10a585c0bcc5/76599212691.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/28004614174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892fbe5c-5a5d-4223-a9e7-a2b68ac323a1/teresa_giudice_instagram_bodybuilding.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_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 4988 bytes
SHA-256: e05b5abe6a66cb9ccb3fae6a2f988b423523bfc6c8128f40bd34c08a9b619d97
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 11660 bytes
SHA-256: e588e8b7e0d241091e9d4f703e6299e740cd1c64f160d99188b4893dc28e3d8a