Malicious PDF — malware analysis report

Static analysis result for SHA-256 694fabcb50fc9d7f…

MALICIOUS

PDF

71.9 KB Created: 2020-11-28 09:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 258d69b2ca3ec4b266b1892dd776d3fb SHA-1: 90e8b225ed190b1e5586c48262622e9a1c7fac26 SHA-256: 694fabcb50fc9d7f3e7ec2992af989b5a566a2a3d8a9463409864e380bc09913
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/aws?utm_term=bride+verb+form PDF link annotation
    • https://jonurimexiv.weebly.com/uploads/1/3/4/3/134321783/sivilopulevenosis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411708/normal_5f9e027e39045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_5fa915fa80003.pdfIn PDF document text
    • https://pebekokinusixi.weebly.com/uploads/1/3/4/5/134506994/fezinekebiwogagutal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f870ae3b3a52.pdfIn PDF document text
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/nibusuko.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/50eebe.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/7fb7b4b4-d8b4-4d33-9493-498914100435/caracteristicas_de_plataformas_virtuales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18206093-133a-4a36-b896-8b7143415ae3/the_great_gatsby_chapter_7_reading_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc01d85-7f37-4e08-8233-32a00e18c248/el_comportamiento_humano_carlos_eduardo_cobo.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/9616560040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171e143e-d128-442f-9b12-274120766d88/89904522535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef90527e-b3ba-43ba-86cb-8de7cc069e58/vevelip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aecaff4-2c84-47c5-9b7e-40a186b8788b/86878480586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4f6f90-e950-4544-85fa-595b0069c306/74780568097.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD26 3048 bytes
SHA-256: 153985eb4e8edc9090ac573bb8fd2b8e7470c872e9ae19a52709139a21dc100c
font_01_sfnt_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 4884 bytes
SHA-256: 20f746b7cad39c3d9044cb77f58c733a98175e7bb034e24beb5bf71854cabe03
font_02_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 12620 bytes
SHA-256: 956d81002b56e716f7f454672edb05249eaa3af274d5f384bc1f92892a78ad2a

Open this report in the interactive analyzer, or submit your own file for analysis.