Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fee46010d58fcd…

MALICIOUS

PDF

75.1 KB Created: 2020-12-31 02:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8ddafca4e445605bc154b98c0af12302 SHA-1: c303814bc50c82e8978a30810d671145f4723b1f SHA-256: 12fee46010d58fcd8b461acab818ecce49af583436cbe1497ca8b66152232897
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm for SEO manipulation. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://trafffi.ru/123?utm_term=tenth+value+layer+of+lead+for+cobalt+60 PDF link annotation
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/letotazud_jixivusinowos_suvesi_tevawibagi.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/2dc79b0c-e000-4c13-aa54-9c878f5e3a41/case_for_christ_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4655a7bf-47e2-4be2-b3f4-ccedd8181220/zebra_story_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/mogesokenanavofumol.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/pearson_realize_answers_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/34036365404.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/printable_oakland_raiders_2020_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/catalogo_hinode_2019_ecuador.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_off0000e36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 5480 bytes
SHA-256: df3c1c15c3f21419d9c3e0948bb0ebc61eef424517d67e5c972c24114086934a
font_01_sfnt_off0000f611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 13500 bytes
SHA-256: 9c2e11f4853e70be8f3757b36a1cfd100ed215bfe8acfcf559a00057c2d14740

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