Malicious PDF — malware analysis report

Static analysis result for SHA-256 096f480d3f4af898…

MALICIOUS

PDF

86.4 KB Created: 2021-09-04 04:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4e33555c31527f1e31de2e2380d289fc SHA-1: 06883ebe9da2712bfc4e6601573325be775be6ce SHA-256: 096f480d3f4af8983b2c7e2ee0355739310662764cf1f744df089c285c76c760
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple compromised CMS upload links further supports the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=manual+do+usuario+amt+2018+eg PDF link annotation
    • http://jejuecotech.com/ckupload/files/87838933090.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16080a11ba14a0---jujazem.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/magakazavoxuxipexeloz.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/80759894769.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2eb0a67c---zesabutijibiwofaj.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/88908079531.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/kekev.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/xurovakofomupipezirub.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/wuzomamuxexikusoz.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62ef9e2d1b---barabeno.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/144051281.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/fabikutafuzon.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/lobezaralox.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/56487666282.pdfIn PDF document text
    • http://showpelec.com/data/file/20210829_000710_987.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/dc17d16aa2bdfa869bcb76ccaed9c5f8/88557235954.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/1154671130.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608d102dcd575---28977350051.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/85474500578.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611da2164e47d---julomokaza.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/d99d8cdfa6b3d740bfc0bf3afa32564f/849916551.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/r58sjhardaoe4vbiha5opphcko/vibosipokumiwazolaligeb.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3g634r8eo4ovos2a4s7ta5sp33/jipefejonas.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d2fc56cc---sejojukoju.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_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 16600 bytes
SHA-256: 7a626a791f78debe14b6170c41f002a35cdaf87da34c20538be5f52df5f1c265
font_02_sfnt_off00011bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB3 18396 bytes
SHA-256: 04a7bd1972e5b09e9d1c9647fb7fcc30cdf6f90fea02adda723e7c5fcacaf76e

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