Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae55cfe9b3db969…

MALICIOUS

PDF

88.0 KB Created: 2021-08-23 14:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3e557dcf3b0ae501dcba0de84a07c64 SHA-1: 1ccb1ed5ceadbbb5c24a58ce504e97777b61d882 SHA-256: 7ae55cfe9b3db969162685076f3eaf54b3948275ad059f76be57bfed7a859982
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to download and execute further malicious content. Several heuristics indicate that the PDF is part of a link farm hosted on compromised websites, suggesting an attempt to distribute malware. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30780d3c9---417105664.pdf In PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/98630763590.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb5f199e1af458af2452cfcbb5edd396/sufebikaxozirimipavamozaj.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0433a47e1a---9440278266.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///tasutikujasogajigebojit.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/a0a4ede249245ee3103a48cfe519c56c/voxepasodaketuredaw.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed0da09f8---xopudugi.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a67651476---lugomiraba.pdfIn PDF document text
    • https://esz.jp/img/editor/files/tewokizedodudijonediv.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/86663887516.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/14478776096.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16077909a6c8c0---newakisalujopowegekav.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a795d04a3bf---gabigivir.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb00235ecd---78428819562.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/b2c38a6566b85d20aad38a88f9f33cae/zudiwikixamugopokebo.pdfIn PDF document text
    • https://tonycustomtailoring.com/nbloom/fckuploads/file/76643556977.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/49714331402.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/46693919536.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/2f3d2b2c90f83cced1b4e327e61191be/fodopudunojogaxetu.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/viwikafuj.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9tkoellrhaegkr3shu81sb4b21/tijolukofekina.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/bdb6573655b8282a05adda503dc720cb/37154051205.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/hgip6tfthtin2t9rbk9nqnuk5b/juxabelobofusi.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/jubetirovotaligijelogi.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/ruzumojaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=today%27s+final+jeopardy+question+and+answerPDF 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_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 17288 bytes
SHA-256: e1b4e5a56caea3c252228b49541cc6b8a550a065dff79a3ee9054c389ab69187
font_02_sfnt_off00013705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13705 11064 bytes
SHA-256: 2f914f9ff6e31fdef087c1c43f95cb80b20e638998961b87d11f6cfe10e450fb

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