Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fb0ecfb848b1c3…

MALICIOUS

PDF

72.1 KB Created: 2021-09-14 05:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fde63b88db196e9506aff9bbd182c053 SHA-1: 6bad94efaff740542575e05e599907812018ba3f SHA-256: 15fb0ecfb848b1c32cdc7fcae77388b7cdef4f0ca7c385cc05b4fc79d5614de0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://inwebjor.ru/uplcv?utm_term=zxing+android+barcode+scanner PDF link annotation
    • http://www.ferm-matic.fr/upload/file/54262799398.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/sixomatuladewugunoxo.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/nezunigofekijizu.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/lenanevofe.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/50976207816.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300bf7b0130---5619482253.pdfIn PDF document text
    • https://sanidom.pl/img/file/58688266070.pdfIn PDF document text
    • http://hydrem.ru/images/file/98648207820.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/varoli.pdfIn PDF document text
    • http://zatacorp.com/upload/files/92474117701.pdfIn PDF document text
    • http://land89.com/ckupload/files/98186121754.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/66553281175.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/jemisavegoni.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/nekunobexazab.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109091247491976.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/mebiwomefibebejukavada.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210910174637.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/zatozowogepivebobipole.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/71335751384.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/jekoduwizovadulitaz.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/33889413361.pdfIn PDF document text
    • http://pvvc.cz/files/34322521765.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/79921294458.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_off0000b92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92F 10604 bytes
SHA-256: 226e7ec2f84b293e71f1f8cce4b58236604eb24a06de6a6e6383fd0843489c01
font_01_sfnt_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 16192 bytes
SHA-256: 7955e1d424e6fe0d8dd3aa69f3db7c749d34b0a4458d850e263879f6790176cb
font_02_sfnt_off0000fa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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