Malicious PDF — malware analysis report

Static analysis result for SHA-256 826acee52b0e0b1a…

MALICIOUS

PDF

83.3 KB Created: 2021-10-04 22:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f38a1361c02648ca5762c692b744d3ee SHA-1: 7abb28bd862340a6e70ef28b93fdd328e7e08143 SHA-256: 826acee52b0e0b1ad7807c959fe9669230e2ab574bc29ca815413ea99ede17b0
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maritime-models.com/userfiles/file/fafujigakole.pdf In PDF document text
    • http://bresky.cz/res/file/lojinejuli.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20211004033059.pdfIn PDF document text
    • http://korio-olsztyn.pl/userfiles/file/71111850743.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e73fdb24a1011329ec62cbf0acb4c1b4/tamadafakanil.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/28043875411.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/52477902186.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/2883135684.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/neriwuba.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/nibuniwagolofodifimalos.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/55939846797.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/zasuvujevifi.pdfIn PDF document text
    • http://machulski.com/public/file/53889820137.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/wamesezez.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/55634545469.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2237a2a3d3ca47d7a738bafbbc42d30e/pijusipejavu.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210924113205.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/28216841530.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210908_7F3ED4044A2DA28F.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/34928785075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+are+some+similarities+between+prokaryotic+and+eukaryotic+cellsPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 21912 bytes
SHA-256: 729c25d84f52eb6dee744253d564eb607a3994622229071a17b04d05c105ffd7
font_02_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 11304 bytes
SHA-256: fc3feea25b09f0709c666b6a5322cdf6c011d86eab9c0303e2aef8b9de04cce5

Open this report in the interactive analyzer, or submit your own file for analysis.