Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc677bd4d4e061e…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 01:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 148ed90a61f6e16c12fb04a626e8821b SHA-1: fc92240eee1087ee7cb6da3f8605494ca6d8e7ca SHA-256: cdc677bd4d4e061eaab8628b8f155ec437c9ad1d6d31397cee6a80d0dd14b9dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using such sites for hosting malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2f45b8c44---96018857845.pdf In PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/genuvu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d627e2f2569---50373583245.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/vuzodofonizumiv.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/87311994652.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/26018389673.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076e5d2a10bf---vemulomazozusedejufutufoz.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/disofazifozewunaw.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/nuwiborijibovesukobim.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/42276614412.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/23967988911.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aed653226---nisalufitugakuxotowepi.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5e83b0c348b988a863e16d188154e868/kexivabefamajetaw.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2928d66a2e---zuminarodatipelilovopujan.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/fudazekezelubitaj.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cmlj606e6debehnlvvttav0rhg/dizewu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ed3881bfc---riwapisemad.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098299690586---12782851003.pdfIn PDF document text
    • http://mariancozma.com/_user/file/87820326659.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c256a1c2ab2---62702617905.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160983c0fb13bd---lokokarinuritepituwozo.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///mefidebokunuwomone.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/vurapezelelekufelotele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+silent+companions+endingPDF 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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 10824 bytes
SHA-256: 0e63100627fce9e85f8f9bc7a05a0b928d3985446f31f0470f9eb4b024e6b54f
font_02_sfnt_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 18104 bytes
SHA-256: 93a9393ebdb29994f618db72303cd66bacd450c4faaee07aeabdc9129fb70ca6

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