Malicious PDF — malware analysis report

Static analysis result for SHA-256 7613338301558e23…

MALICIOUS

PDF

75.9 KB Created: 2020-12-18 19:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 39d90bd304fbb2f7bbbae74110eeef8f SHA-1: b76cefd031a0f166eda4f75e0c78362a2e957a79 SHA-256: 7613338301558e23276cbbe7c3ef632f7a886b095af41d615d30a55534249530
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=soundqubed+hdc3+12+d2'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=soundqubed+hdc3+12+d2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fbb91dc22c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f959c3d76742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5fd091b4279c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fa3a06fc9d66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5fc98f9754d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f9208615859a.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/12ff5573-9b53-4f57-ac73-990234298a3b/mifovenepanewesiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8349a83-7c84-4781-8397-2b497e56b159/revawofet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c429ea98-e214-4437-9a0d-2e4c3f9cc7de/accounting_texts_and_cases_13th_edition_solutions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fcf6b8f14319a51dc31babe/1607429008756/run_ball_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc5f44eeaf37e3b64698935/1606808655459/movupologijuzig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6de2be2afa34b64ab27c8/t/5fcbb5d233fb14715cc1cc5f/1607185874274/87832534039.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5145da3bf4b14abc40464/t/5fc522093c6ccf69f3030be8/1606754831691/jisuruburijetepusijeda.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_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 5228 bytes
SHA-256: 8a557ee352a7434956e918bb980606ca0f01fb716222ab8028f857369b47d4ac
font_01_sfnt_off0000fd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1B 11076 bytes
SHA-256: b015e12f80f6be418ee021e6fbfe82a485d3f49d135e621116db653c4237b7d5

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