Malicious PDF — malware analysis report

Static analysis result for SHA-256 88df45bc47ddd46f…

MALICIOUS

PDF

74.2 KB Created: 2020-12-31 01:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 49db4ac1d4cda8e82960352cd55ee098 SHA-1: eacb6d8d846da566f3f4ec02492ba494bcca57fd SHA-256: 88df45bc47ddd46f8c6260904d9d9acc47e69c1d9a49f00f17bd1cf53a34f3fe
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Hydraulic sprinkler calculation software', aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=hydraulic+sprinkler+calculation+software PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fe40fa5b1399.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/PjgcVjb/japudoviwomexejorikoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416929/normal_5f9d3d23b0563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f8d93e143b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5fbc818f19c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5fb2d84b62207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460476/normal_5fd91d0df2794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5fa0221aae5bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fb911e903be7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_5fd9e19cba2d3.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/tibitexil/manual_programming_baofeng_uv-5r.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/wheel_of_fortune_puzzle_board.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/pronoun_antecedent_agreement_worksheet_10th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/cleaning_checklist_template_for_childcare.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_off0000d7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CE 5252 bytes
SHA-256: 7c7de2b8aa49844e25081338ffc5f97aca5cce29b7d1e2bb9216b29f8fb00721
font_01_sfnt_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 10536 bytes
SHA-256: 7852c619035024c85421dd94e993e5a5aafeab44d3c1ecab9abeba2c1f867318
font_02_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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