Malicious PDF — malware analysis report

Static analysis result for SHA-256 115022eeb3a85a9e…

MALICIOUS

PDF

92.4 KB Created: 2021-07-17 16:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3da0438d167443dfa8d050ef05c4ba5 SHA-1: 4cb30c3ea2e8758867fe01a73e1fc28be6265095 SHA-256: 115022eeb3a85a9ea00a33d80f5c3409e4deb8c1bd2c8f37a34eedcf01bbe88f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the heuristic findings and URL patterns are sufficient to classify this as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d019d9843438188650d9db553966951a/riloguwewolar.pdf In PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/48183312138.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfbc55fd5b---88083823462.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/guxomidarununevanigot.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/i2aj39j97vpmqr0famsvg9mki1/45737786221.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/36689542232.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31d812ecae---24109568886.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160710e4b2124d---95055482578.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/efa0d436a60e9f987a7c349b5ac976b8/15504226172.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/6238663899.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/fixamumunuke.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fe470a96b---joxevulaxetowumugolu.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/luxowemufed.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073654d42a16---boximeromipagi.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/99630591585.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e3eb710f2cf---tixamiraxukalavum.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/i1o39l5i3lsno41qij2567pfs3/xazetaxe.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/netavufaliruzuligimoxox.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/58575537995.pdfIn PDF document text
    • http://bvsaigonbinhduong.com/uploads/files/64199276787.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/54265014265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=it+director+resume+samplesPDF 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_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 17880 bytes
SHA-256: 11688bebdc03b88ec0aaef224743140ba4aff3717d84c1beecb9cfcee0fc9962
font_01_sfnt_off00013432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13432 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C49 10624 bytes
SHA-256: 4261a84561d8633f1dd65ec9a351fc708ce421e0d625335548ef315fd3227c56

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