Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebada06b3dab9d7c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 04:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 738a6c992818196f9b908cd79e1ae994 SHA-1: ab35457b42839bb8b9ba30b00462987197bac0dc SHA-256: ebada06b3dab9d7cd306931b97c6a4843355bc9e5010474afabad09ab71a7097
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://technocom.pl/editor/file/jejazux.pdf In PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/r0t7kc55mr72js8gnl7qbntlm8/gebalegapikegujivuw.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/lazasodunogejat.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/jedudopezawefi.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5c9f37f69c---45408453638.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/10070463113.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/nokusuxilukezesi.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/zepuzelino.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/jifezepodapesiwigutoju.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/89630126653.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/94732370319.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/abd39067db7a4b43e549c93c39a986b9/75140447077.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/98627107289.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/85769135164.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/kajovividufetuz.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/014ac08adc6d5cfee4ea93a4b8121c26/54823058283.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51b1914cc---82767620254.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/jefev.pdfIn PDF document text
    • http://vodnik48.ru/content/file/69965558187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sawstop+professional+cabinet+saw+manualPDF 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_off0000d651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 18616 bytes
SHA-256: 3df8209ec9c0170baac38734289c27de8def2013a8fb5cafb02edaef8178a24e
font_01_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 11040 bytes
SHA-256: f85a26e11bb4dc884cf79136785526e26f69f1ca4bdadecfbb64161eca7af540
font_02_sfnt_off00012052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1