Malicious PDF — malware analysis report

Static analysis result for SHA-256 08aae2d7cca38481…

MALICIOUS

PDF

235.7 KB Created: 2021-09-07 20:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83d279f965d8cdf6c0999e758addfbd6 SHA-1: 7ca8f73a69be5b739803d5ff0d75b576d487f1da SHA-256: 08aae2d7cca3848147d011aba3147247cab2c28ee2b2a6e89b1bc21546e9b724
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.001 Process Injection

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of link farms pointing to compromised CMS upload storage, suggesting an attempt to lure users to malicious content. While no scripts were extracted, the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9841

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://lifesmart.lifesmart.ro/ckfinder/userfiles/files/ritinodoxitesufozemujuw.pdf In PDF document text
    • http://lawyergz.net//uploadfile/files/segezavebozotajeserevanet.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/mubigavalupujok.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/ziziwotobij.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/gupasulidusevogiromoza.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/dijoguxezubesokixozunoxo.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/32480779301.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/rikipofelovefalibexodabe.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072846c82634---berawonitefeluvujuzelitov.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/25870956333.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f3a787ca8---kedixevimarek.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/vofirojiv.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210713_050238_1936.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/zujatu.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a2688620a7ac23cb01415b1ab088c696/64538495842.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/vesikemeneretekasebo.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/5dde3894bb7ca1eace50a7bf41480fc4/rikowadidajido.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210702171124_cg8bml.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/mevotakebovawimikupavemaf.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0639d79ac---67388337211.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/todaxegabixikadumu.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/58701269897.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c077920387---12200753604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=eneide+traduzione+luca+canali+pdfPDF 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_off00033e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E44 18828 bytes
SHA-256: 66dade94635dcdcca336b440adee57420e43c668d7442ca4f6bec817730c9742
font_01_sfnt_off00036fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36FBE 10588 bytes
SHA-256: 98b67de7ea9064ed6beebc6bd11c6e9424ffe17680e9e2dbe3b29e887b76f69f
font_02_sfnt_off00038805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38805 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1