Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d6ed4c2197f3ac…

MALICIOUS

PDF

81.2 KB Created: 2021-01-02 12:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: df4e85c2f520fb76a76d61c0b9507a45 SHA-1: 4617fe5b8590bf8dfc84ce3fc3131d9676ae2d1e SHA-256: b8d6ed4c2197f3ac310d14b5abdfcf503c22e482ad53963556329961ffa55ece
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

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://gettraff.ru/aws?utm_term=road+accident+report+writing+sample In PDF document text
    • https://static.s123-cdn-static.com/uploads/4496389/normal_5fefd8cab82db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_5fad23ff32406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fbb7b9e7606c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5fc21c3ed5868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422879/normal_5f9fe405427f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_5f982ed51497f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5f925117a6875.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/fffeee76-ebaa-472b-894b-8fe306fa559c/31420778578.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/18776401392.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/diagramming_sentences_worksheets_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/zoranumamoganamajez.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/7022690067.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/lofir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79fd4dd-39b4-42e1-9897-a4fdd57b86a6/19900819044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce911c8b-7f32-4546-b6cf-093f16d626d6/xezoxojom.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_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 5492 bytes
SHA-256: eea4079b8050f0b3f69215b349926096e54f6ca924dda3bf7523f8d6bc92a277
font_01_sfnt_off000112f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F1 10772 bytes
SHA-256: f268b395702b8d598da33443fd7795183909972da3001786e48315437055f255

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