Malicious PDF — malware analysis report

Static analysis result for SHA-256 9172e54053666056…

MALICIOUS

PDF

70.0 KB Created: 2020-11-19 23:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35ed76bc36237de5eb0584d88dc7f303 SHA-1: eb3342ba439bff772af3bf46cd4145218c4e75c5 SHA-256: 9172e540536660560efda95fe65569be5a6d8313901fc7076ee4fea5e5eb15e1
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL points to a known malicious domain, indicating an attempt to lure the user to a harmful site. No scripts were extracted, but the presence of a malicious link is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=introducing+applied+linguistics+corder+pdf
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f888eade1896.pdf
    • https://cdn-cms.f-static.net/uploads/4421215/normal_5fb5416bbca22.pdf
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5fa58e3a62ca8.pdf
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5f99c7b197464.pdf
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f8744a125c94.pdf
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5f9f6a582a92e.pdf
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fa5fcf7eb949.pdf
    • https://cdn-cms.f-static.net/uploads/4404500/normal_5fa5d61c123aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a81e612-a81b-4e77-8a01-737befb62369/sijelikowojejulujog.pdf
    • https://s3.amazonaws.com/besafefaf/witch_hunters_witcher_3.pdf
    • https://uploads.strikinglycdn.com/files/ead77534-a0e1-4f0f-b3e1-e60228898692/6120998502.pdf
    • https://uploads.strikinglycdn.com/files/bbefff55-4a9d-465d-be1c-dca6f2c66907/1565548780.pdf
    • https://uploads.strikinglycdn.com/files/dc73e1bb-3bbf-4b15-a04c-459b7ef4547f/vowuzo.pdf
    • https://uploads.strikinglycdn.com/files/f9e60b29-a374-4130-816a-d1bbace7e1ce/mopawanu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b080.bin
21ce952599f492e7e2856bd090e00735e540e44284a4ca9b1700d2090b670209		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB080 3516 bytes
font_01_sfnt_off0000bd0e.bin
1f85d512b323a2da92d2f450c1750378f17859aaa23bae0b9ed07584b469f4cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0E 5260 bytes
font_02_sfnt_off0000cefe.bin
5a5086f331c2085628a53058b07a344d7f5b895ce3ff6dda1787a9a986eb23f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFE 11428 bytes
font_03_sfnt_off0000f503.bin
da4b164e559004f6353f0a5dc6ff39c750a4dde01d42a555aa960bfbd3bf1c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 16208 bytes

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