Malicious PDF — malware analysis report

Static analysis result for SHA-256 254dd6b102d3b6bd…

MALICIOUS

PDF

77.9 KB Created: 2021-10-07 04:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 11d1a1e718390fe311d6656fefcae1f4 SHA-1: 0e3180aa42cb800965957ecfc9b79202acbb74c5 SHA-256: 254dd6b102d3b6bd4a7022bece60892775966667f0ca9e8f04fe5664508c0bb2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 7

  • 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.
  • 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://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f742a5c3fbd1df445c6dac5606aea435/kuporinoxisazanalana.pdf In PDF document text
    • https://grup-insaat.com/userfiles/file/jibepisiwevasot.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/tixedotizob.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/01246ab5d6a2bb9e88339fe205393a43/64795287361.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/mavoputevotofukibamisur.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156e09ad4bcd---39828154747.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/gasavivosuzuzuw.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/2b47c146e5f30c3b9f1b0db408d769bb/robese.pdfIn PDF document text
    • https://truongdongkinh.phapluatvietnam.com/upload/ckupload/files/98064552359.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090401014473499.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/46638922790.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/guretawonixuxulutopirodi.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/zebemimuvibosa.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/86592075278.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/6225036704.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/tomonobax.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/fuwabilevanaka.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/0el6d43cb0gqgec6p8b0043qj7/wuxoriwawajaviwalajafuwo.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/82181842458.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/65835791673.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/dajakaxinumepukizib.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/44771096991.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/89805822994.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/12383329074.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/lowesadu.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/dowovugejep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=free+download+architecture+magazines+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_off0000c758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 18532 bytes
SHA-256: abec9e030b4384fddf6e6d011eb67e473ce6e9487cc763bd65a26b08edeebc3f
font_02_sfnt_off00010fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA4 11292 bytes
SHA-256: 552e3d760e27665a9b728b162a741bb787355621f3b0174b7a3af36caafde71d

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