Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed3310040134158…

MALICIOUS

PDF

89.2 KB Created: 2020-11-18 12:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 22f60c8c42acfa5b8c4df544686a051f SHA-1: 1d5c463e45472f89a3b8a384c4486ab9372de5fb SHA-256: 6ed331004013415845e331036679f38910b17e088f3c368adcbcf2ead32b028b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'sanitary installation plans'. The presence of an external URI strongly indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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://trafffe.ru/strik?utm_term=planos+de+instalaciones+sanitarias+p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fa6d372c35ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5f99b6ac3207a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5fa9765dc5a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5fa1517db622c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8af13d5ddab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f87409962096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5fa3ca573bd83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5fa6f826a99e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411220/normal_5f95cfc700d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5fad7025d0002.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xozeb/76930282603.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/pigafewunevawovi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/23056161619.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/anthem_final_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/whats_the_tea_urban_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/participles_worksheet_and.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_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 1696 bytes
SHA-256: 9a98723dae936e7c7c8d502cfbcf27bf9f93cff28ba6a06675a6a95244fbc4de
font_01_sfnt_off00011e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E60 5068 bytes
SHA-256: 4d2425d005d22f0760343d64b9bf198d79aa2fe62cf47bded45a7fc147e9dae0
font_02_sfnt_off00012fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA8 11712 bytes
SHA-256: 81a9d09bfff164e2525cef26aea78841f7910e7f16402af513eee1af5a1f6aa5

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