Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c1ba67e59c1ab4…

MALICIOUS

PDF

432.6 KB Created: 2021-06-17 14:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b82455eee50a10a60d5a71729a392e08 SHA-1: 85669b2ceb203e03b6827ac6a632d06d30e75e2e SHA-256: 94c1ba67e59c1ab46b523108aa1a00322de5d1d9c912234c9435c2c951510ce4
126 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, some of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=lord+of+the+flies+socratic+seminar+questions PDF link annotation
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/80a75010c6d33b8f6ef1902641baf9ed/74496621165.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/20564889256.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/8bab0ba64f04532037b27cf607c7d655/62893684748.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/runeg.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/beweb.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/66223505539.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4bd3e0a3f6df5f77e1514b98a0f0e853/juzanufet.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021052307041373499.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cb17bfec---nevalotetenesix.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a15de848b87---xuzivalovipapatozixa.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608d031ad69a3---35981478658.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/73b032737aff454e6e1b3cf37585957f/28172779939.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gis058b0h66jelkslar12ipig6/zerozo.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/80323934614.pdfIn PDF document text
    • http://apvn.info/userfiles/file/nulofejewafinewowe.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/e8a981fad60ba354a63d6974c964cf7a/22661064399.pdfIn PDF document text
    • http://charivne.info/images/file/lepuzubuju.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/lijepole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00067573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67573 5328 bytes
SHA-256: 8a6ed85ff75f54db6d61f96423899dfa4458f447af85d762f7e2c3dbc2b6b344
font_01_sfnt_off0006876a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6876A 14016 bytes
SHA-256: 4e5947835ee29d5892deab56ce28312fbc65268b8a3b1a1ec6d28b47f6ea16a6

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