Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dc350cc7f3eb12…

MALICIOUS

PDF

73.3 KB Created: 2021-09-19 14:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 063252c8a35e6a704071ce499fda2c5a SHA-1: 173e05b04e15717e7e08229511c6a8b452a3fd2c SHA-256: 30dc350cc7f3eb12b0337d86cf42df8fe27be62196ffc60574e9dbcc4f9bd178
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely using JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=offline+clash+of+clans+apk PDF link annotation
    • http://gartenmessebau.de/uploads/files/bewefumez.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/dodij.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/fekojagegusosozupedo.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/lujogawasowidojenekubuxo.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/wezujalosebujodojebu.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210912052912_c8dovd.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/jonojojopiwiso.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/c037dceba1cb71a65a8572ec938086b0/rakudegisodovovawefej.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/55088236308.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/gilibasir.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/46072415766.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///13556606526.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/togorikul.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/wixuvugasixajodobaruv.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613854f18d56c---waruvuzo.pdfIn PDF document text
    • https://totounited.com/contents/files/82316847848.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/724950332.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/nirev.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/bc1b41b1d498f4b4888e2a008898321d/jivifemagipudopobasozinut.pdfIn PDF document text
    • http://sns.hu/_user/file/navidupokatuzipiwu.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/69190314059.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161323c603b414---46499110625.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_off0000bba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B9 17196 bytes
SHA-256: 9a156edb56079c5579b7ebe771802be35d384e6e2592f3b66c8e640821575dc4
font_02_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 10496 bytes
SHA-256: dea78ad2b18e08251671562872a0669be49d88b57d2c6a55a626a39e0015fd25