Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf3856bafbbee35…

MALICIOUS

PDF

124.7 KB Created: 2021-03-16 19:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ebe94635c19531efa3c9b4964491da0f SHA-1: 902d105022e44d0d908d462316c5340a8ebb1005 SHA-256: ccf3856bafbbee35d0d3cd0a5f631f0b6e43624f5963915e4d4c1785dc6f85bc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://vilenefex.ru/wix?keyword=tbc+leatherworking+recipes', which is likely used to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=tbc+leatherworking+recipes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428335/normal_5ffd27e8ae484.pdfIn PDF document text
    • http://stonersfranchise.com/vagebafvwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_60452eea0f75a.pdfIn PDF document text
    • http://kafalogu.22web.org/61503605793.pdfIn PDF document text
    • http://vuxiparami.22web.org/muvavewuzezofosedip.pdfIn PDF document text
    • http://5coupon.info/oklahoma_commercial_drivers_license_manual8yn5f.pdfIn PDF document text
    • https://cdn.sqhk.co/madeparev/BMejbtP/search_quranic_verse.pdfIn PDF document text
    • http://znasila.ru/padi_open_water_diver_manual_section_1_answers3l0sy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_602642786723a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496378/normal_6026c0223f08c.pdfIn PDF document text
    • http://clubstore.pro/dazikizodozowakuxekebakulafdeg.pdfIn PDF document text
    • http://frut-tree.site/xexujekapiftp0oh.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/7b8gja2/53175515514.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/mosezavor/diameter_of_a_circle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/64517520956.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/spider_solitaire_apps.pdfIn PDF document text
    • http://kedixiravupit.epizy.com/superman_movie_in_tamil.pdfIn PDF document text
    • http://zagaturatok.epizy.com/febogovolunekife.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_29931287048546eb87e0a755725357c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/20616475443.pdfIn PDF document text
    • https://cd8fad78-6a19-43c6-878c-830d169ee42d.filesusr.com/ugd/ff0d91_a317148365fc4e39853faf2862190cf0.pdf?index=trueIn 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_off0001ac12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC12 5440 bytes
SHA-256: 8d17ac78d33788f5ea8e5f42c53d3e1e06dc8567a1d40501afea3e89debe21da
font_01_sfnt_off0001bea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEA1 12128 bytes
SHA-256: a49779d91934d7fd6ac9388572b628d44117bc7cbff3cedb2355e8a9af2e6bfe

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