Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86ef149756f4e2d…

MALICIOUS

PDF

93.6 KB Created: 2020-12-31 15:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 601fd5d6de6a4e925d24cd7ff5a22566 SHA-1: e5bf5b1a4934122bbc20c6e42ea587f09a1b468e SHA-256: f86ef149756f4e2dd28873a4d7a2afc15145cfd91fdeda0b4cf8259374c39e28
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 by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, embedding a large number of external URLs. The primary heuristic indicates a mass of external PDF links, suggesting an attempt to direct users to potentially malicious or spam content. While no scripts were extracted, the embedded URLs are the main indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=york+county+pa+deed+transfers+2015 PDF link annotation
    • https://cdn.sqhk.co/gemadaruvow/rugeOj2/77769612298.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/BDjfge8/wallpaper_engine_zombie_gif.pdfIn PDF document text
    • https://fazotevepokok.weebly.com/uploads/1/3/4/8/134865813/4725677.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/1124112.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/wekuzilawo_garif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c61996ad-fa13-40b6-aa5e-1a3e2fa68ba7/84011878856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90d3360-ffe9-45aa-bc3d-4e921d45b4d6/67142607928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa163149-8d69-40a5-ac8d-de008ebb57d7/christine_feehan_dark_series_audiobooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95712796-1575-466b-81a4-8effdd12801c/62198776372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9c2b33-6b54-4e96-8fb7-df824c9806f0/credit_basics_worksheet_answer_key_2.6.2.a4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1409002-ca69-47ea-b5eb-23c7796189ec/gepemo.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_off00012436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12436 5528 bytes
SHA-256: 6b7eda7115fa67a0703d13f225586bb11990ed4462eadfde67a6aacc47e5d3b8
font_01_sfnt_off00013720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13720 10736 bytes
SHA-256: 81d89cb73f0aaab0e05528a34ed2ec01e8de0ee89c63943d90df9a51b23b3803
font_02_sfnt_off00015b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B98 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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