Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aedfd0391a32baa…

MALICIOUS

PDF

80.9 KB Created: 2020-12-28 20:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c406571b3463ec49641c8aaaf1e7b6a1 SHA-1: bc87fe45ccfaec7a95664f191999bdd9d6e64062 SHA-256: 5aedfd0391a32baaf32152c8dbfc4d65c95779511911bb7db4b5ccc15ed53cf5
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it's designed to redirect the user to a malicious site, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=short+wave+diathermy+banned+in+us PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5fb33e9bc767b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470224/normal_5fc69d0ce4886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_5faebaae1c8bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lewuli/borderless_gaming_6._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ef13ca-7903-4046-b503-4accf505bd7c/lomizidutu.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/huntington_s_disease_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c60d3f-7114-4e44-965f-838b53adfdd2/ice_age_movie_worksheet_for_evolution_and_ecology.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/provinces_short_forms_canada_post.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/potaw.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/aqa_english_language_examiners_report_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ca20f8-ebc9-4840-b628-7c18ee9926af/rowugitirusor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8fc191-4a0f-4300-bade-491faad24d90/eso_orsinium_treasure_map.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/19065804298.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_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 5532 bytes
SHA-256: d8f5a270837ba035ca05aa5a344d08e5a3bf7cee06afb32eb32116e4a0443d9f
font_01_sfnt_off00010f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F25 11668 bytes
SHA-256: 0e774fd165dc1d138eedd88add8565609181790341ab7a8fc793e32f543c1997

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