Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fe0037b7e1237a…

MALICIOUS

PDF

122.1 KB Created: 2021-09-06 14:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3dca8a849cc987d3011062f967db65b4 SHA-1: 3b25a5b9fa4a26f0499c7b7b00a7f0b864be1204 SHA-256: 02fe0037b7e1237abf9c5ab137d530f7383129736025d71e3c881209d2878b8e
224 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://cobmedia.hu/include/sojipojebu.pdf In PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/kutafofijaraxezosigirav.pdfIn PDF document text
    • http://novafish.it/userfiles/files/80836123851.pdfIn PDF document text
    • http://ekotronic.eu/files/file/kuzevijidoxiw.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/5jcq964nqisjvo76jv217eq6ie/31780230729.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/fopurigudunivu.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610a48b198a01---tujapiviti.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16086435d6cdf0---58767751735.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/pirokipubulelusazovapar.pdfPDF link annotation
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/fegododozo.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1as2l4339d5s9co47nuioshobv/88676467504.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/0cdf9806ac90520d205f63a9d7fab004/xuwemorebokejiker.pdfIn PDF document text
    • http://spiregene.com/image/files/20210718_105916.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/tizusukonarenotakanomi.pdfIn PDF document text
    • http://superpart.com/files/63271981996.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6b60de810---34329962878.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/39130302492.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/d49a9508282b651e8882994c39892f67/vunutu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44667da466---16356730464.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/7e5e58aa8611c1c3faeee388c784ce05/tarozesexu.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bk5l0l24kd4tdq1fbku2035jiv/24387710296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=overlight+rpg+pdf+freePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/44e3c4d233c72b712e388d158550fa99/selekujikifafevavuvegula.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://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_off000176de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176DE 20132 bytes
SHA-256: 78eee2f51c10d9de5895aa907f0ec60b51872ccaaab57b39e4072efad2d13f06
font_01_sfnt_off0001ab5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB5A 10316 bytes
SHA-256: 24820525174817e87e5a98aeac130c23ca77eac663f839c1600681214b9de75f
font_02_sfnt_off0001c291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1