Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec153aa0e3ff37fe…

MALICIOUS

PDF

65.2 KB Created: 2020-11-10 11:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3cee11f586571848453d00022380fda3 SHA-1: d7a4098838edeb6dc345dccbe771bfc93d8f813b SHA-256: ec153aa0e3ff37fed7afe3ca94c7b17e8d550189532f59eb20b94573eeb8b26b
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?keyword=the+requested+session+access+is+denied+azure PDF link annotation
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/sugebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_5fa795d8b1bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f94bd2525f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f979fe611176.pdfIn PDF document text
    • https://kironipopobak.weebly.com/uploads/1/3/4/3/134308812/rebiju-xelivuvagige-vegawivugumi.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/794992ee-d59a-46ef-bd55-1e188caa53e0/dispositivos_de_expansin_de_redes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c428770c-ab0a-4b2f-8e1b-8d63591e33f5/vukutipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e113cd3-4f6f-4743-be1a-c2418637ef72/10302791943.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/57371842687.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/stream_ufc_238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfeb0cb3-4f70-4d26-b719-2f33b0b63fe3/goworotoxetavinimobi.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/zanisexerufa.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_off0000c27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27F 5120 bytes
SHA-256: e2262f5f30c0ce675ee0a93d33654781410ad6b27415afac63b6d5833b6e5995
font_01_sfnt_off0000d3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E4 10656 bytes
SHA-256: a5f23c859254cc69d3315f75e0bf8b561d0e036b397aa3fb949f63ce72e2af65

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