Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc01457653b1c5ed…

MALICIOUS

PDF

82.3 KB Created: 2021-09-22 15:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06d662891836a8389e05a17e0876da8d SHA-1: 6346e14a3b2e26067c826df10211698a90a28404 SHA-256: fc01457653b1c5ed8c27c08cb4eaf25c50c193965e77eb7f8391e128ce0aada3
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous embedded URLs, many of which are hosted on potentially disposable domains, suggesting a link farm or phishing lure. The PDF structure and heuristic firings indicate it is designed to redirect users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rubin2000-distribuitorshop.ro/userfiles/file/79664868042.pdf In PDF document text
    • http://balone.net/_upload/file///kusojebuj.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/zarowalomuter.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///93367708330.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/61695671336.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/51576377654.pdfIn PDF document text
    • http://www.polni.si/Images/files/11843496374.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/guzikupolujanevulekeduti.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/31744251180.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/vodesizusu.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/27258048238.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/34903867798.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/q6aigai8m46g3fja2f16gvc4i4/58664220070.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/talitojot.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/17235286402.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/97110628068.pdfIn PDF document text
    • http://lovesenergy.com/file/26175123481.pdfIn PDF document text
    • http://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/wuzemuvisizafatag.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/nosojukifeporefa.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/52075583833.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/safelolilolemoribo.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/xopenexidegiref.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/12625019711.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2021-9///202197223532913.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/58259225638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=da+pdf+a+epub+onlinePDF 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_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 16988 bytes
SHA-256: 98840ca24da54f7aa8b5f22bff7c79d17439fec9f73a3e9e7959aa26f8c6b076
font_02_sfnt_off00012454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 10368 bytes
SHA-256: 501231c9ec3990d670cbe15a3a6d1158908871fc781031911faf3edd8d583883