Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea627b567abdad9f…

MALICIOUS

PDF

67.0 KB Created: 2020-11-26 10:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dd13202211b328fe38902d62d5c24d75 SHA-1: 1a29c30ba7a77792b042ccc6cad88efc8f727f9f SHA-256: ea627b567abdad9fe7b5cb1fcff6539435c4a43d4df091cde1edb23c571e6e43
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and extensive external links suggest it's designed to redirect users to potentially harmful sites.

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://trafftec.ru/123?utm_term=champs+shoe+store+lenox+mall PDF link annotation
    • https://ruwelijowabol.weebly.com/uploads/1/3/4/3/134307429/gevoba-kenapomunozel-verubikelob-zelafusuxuzika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5faf9ae9a25ae.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/tesozoleropiradubo.pdfIn PDF document text
    • https://xubisimas.weebly.com/uploads/1/3/4/7/134769706/gexalifiwedelurenen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f90e8d9a9910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8b9fcf1a3de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fb2b943473b3.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://s3.amazonaws.com/vizegemawokaxe/maxokarinazopiperalekus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3856960b-f737-4da9-b68e-b796da559f4a/comparative_and_superlative_degrees_of_adjectives_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/instagram_stories_app.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/moon_knight_marvel_legends_toybiz.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_off0000b6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FD 4888 bytes
SHA-256: 3c74a53cd19bc744c27b65ada9a1979d9caa1be3c4fa52e2fd743f69930fdeda
font_01_sfnt_off0000c771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC771 13264 bytes
SHA-256: 5eeebd0674ffb93c4059342dd131243fa948e2469de73c98c267c38c27917b42
font_02_sfnt_off0000f199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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