Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8ee1778c75193c…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 22:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2dc3410d522acb5bd18bf581d24380b9 SHA-1: 7fab3b68989496a69e0e5d942a5f0400455ba48d SHA-256: dd8ee1778c75193ce1a8c36c92093434a44b80845f4a6751c3bbe18d57c59570
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites utilizing vulnerable plugins for file uploads. This suggests the document is designed as a link farm to distribute traffic to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c09f827a933---tevobanikawepesesurogo.pdf In PDF document text
    • http://drive4smilesquebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/42431196654.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/54910523a1b377b2ecc933c5087cdce3/fumafinarewixu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/59e70f4b4acd815c5e1a110484c3c706/97278428400.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb0386839---24448402576.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/21410591193.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af90fa9b151---razozuretita.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/60543746286.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b40f09b63132ebe6b034e79148816d39/difaxajojozexirabuta.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/depawiwogezanonutug.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/jidafov.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8dc90b417---29608098745.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609180844fb87---tupowokoxofidimuluna.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/13936829934.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/371e7e31aec1b30368c79a7465099460/weseb.pdfIn PDF document text
    • http://tragadsonisurat.com/ckfinder/userfiles/files/xafovujajewojaxutiva.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/8c064f63d3021cefc5a26ce709b23f4b/25199307280.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/81224421597.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d291ee8477---fatexadavebitumusuvolavip.pdfIn PDF document text
    • http://lawina-radom.pl/files/file/mirujinopopagijimozuneje.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/a23a3469156ce2f9b5e5d9c7eb3c210d/mafox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=shelter+cove+harbourPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/3e0d9c29abe3a362b0acd52bc0bfe3f6/10979835321.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_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 16840 bytes
SHA-256: 7d7c5acad36cf449e697909981a4c61c205714497256aa9596789efaf7567f55
font_01_sfnt_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2A 10344 bytes
SHA-256: f9b2699d8591b0e8b3d7af2472e589bf67bedc92447c6cb8b832ae7c155acce9