Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13a72bfe80208ca…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 20:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c8adace38b3c9acee3303b789fe1d00c SHA-1: 981c87cf0145c61a8f9fa0ae54cda4793d7cf4af SHA-256: e13a72bfe80208caae83ef4a07d64e8e1a4a110d8ac9212f2b8b28c683edbdf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to malicious websites. The presence of compromised CMS upload links further indicates a malicious intent to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://pixomot.ru/uplcv?utm_term=musso+livre+pdf PDF link annotation
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/ae90670d75381d58c5775535b9e8f412/zuxeruxutoronofeb.pdfIn PDF document text
    • http://indecomavo.pl/inc/29773903597.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870dc761a82---ritupigiwevamuto.pdfIn PDF document text
    • https://landbar.com/upload/files/rebuve.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec388b3bf---wezapadejefititiwexa.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/wevorojozenunutobasoniz.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/3c770fbe4278b4c56c488b26dc3ae05a/87072708094.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9c4a043e3---73963657797.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/33139488386.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/93062841110.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea525652af---56216045454.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/1721479655.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021090111343470.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/2854000045.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/79586415875.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/28917645573.pdfIn PDF document text
    • http://didopack.com/files/4590076803.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/dozepidamawemijomawatur.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608490ef92f56---luborakujakelumab.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb0696424a---mirutoriju.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/9043636157.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097415c8d86e---kezuxugezijikanul.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/baf3ed0977c02675ab984d786b86876f/rokotawudinopezovigobeveg.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdba52578d---91244640929.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/sugurukulerutakib.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/borafoj.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_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 10288 bytes
SHA-256: c2884f8ecb48907305f2fc6b7b32c18aa18db045ac554fcf647ba0067e26b9be
font_01_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 19760 bytes
SHA-256: ed08007511efd4eb393ab6764f43e20fe3e2259972710b66c29c30c7888ce9a9
font_02_sfnt_off00012946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12946 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1