Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d2b5eeca9fbe10…

MALICIOUS

PDF

86.9 KB Created: 2021-08-26 11:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f21fb0d3c79fb0a7117c32d7d8f8444a SHA-1: 7c9f7927a38619df92a47a16fe8d90ec9adc01b7 SHA-256: 75d2b5eeca9fbe10a9ed4b3c3e0632baf4651c68e64bc51831c7b2853d48a23a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nomylo.ru/uplcv?utm_term=how+to+count+lone+pairs PDF link annotation
    • http://sys-svinding.dk/userfiles/file/71918816812.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608110e63bdb2---wujumabebozet.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/zekuvofejobugurupokozepav.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/1p3triltqdtfae88snuvfbnt3o/vodiwedekol.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/73947734282.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/nipegutulozuwikexemukal.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/denobifagedozorapogo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/6b4e1e2118e47506624c4180176de92e/51322979282.pdfIn PDF document text
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/96159600274.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/xuwizuwogolavepub.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ef1d4c548e1acf78a16289ca3a9c24df/44655407316.pdfIn PDF document text
    • https://mszukam.pl/dat//file/35508455366.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850cbb5841f---sibujomixawexenibidila.pdfIn PDF document text
    • http://starsunited.at/upload/files/xedoruniz.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/jexubosekovafebikigezabiv.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/3bfec942450d3d7fb5b88c0368ecc12f/kupuderafadime.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/goganarafire.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/4a2iactk4koqghjdufbu7s6cvn/jugozizerexilaxiti.pdfIn PDF document text
    • https://siroyensao.com/upload/files/wodovikawuvesunibo.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160de10a5b77a0---26603601238.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/n79qrinplprvb3ucimqn8f137i/56568079713.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/9flsvuv8pegpndac3v2fpgqgti/gegolesajivog.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/lelajof.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_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 10544 bytes
SHA-256: a19f7543aa5d8c72d50ab220826ef0bbbe2b98196683bfad03e2e13b3233b835
font_02_sfnt_off00011e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E22 17364 bytes
SHA-256: 07ffbf9d8d6dbad7b508810ad620ce00696838df88dd8f4a3607d3f8ebad57c3

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