Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d705f1ba1f016e…

MALICIOUS

PDF

75.4 KB Created: 2021-08-01 17:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 530ec48c7817599ecc9d7050c0e30915 SHA-1: 1145855949954c8b53bb6d1e5da167fcb015a897 SHA-256: e2d705f1ba1f016ec00c8e2151a01571f21ddad848ba877317870f2a2081c6c9
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and numerous external links align with techniques used to obscure the ultimate destination of malicious traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://laborke.ru/uplcv?utm_term=how+to+do+fake+caller+id+private PDF link annotation
    • https://namdolove.com/FileData/ckfinder/files/20210531_52AD232E81F6AD6E.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855d86c2bc0---83749011262.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/1cff2ac513bd23e38cd0ae9937bd8c2e/64857389801.pdfIn PDF document text
    • http://jarosi.hu/files/file/6205847778.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/jedanabulonizasib.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/fabutabatekapujoxizokik.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/p2egf4o3rt1dm3kn71mobp735s/fopivetipupimor.pdfIn PDF document text
    • https://digireg.lu/upload/60493271829.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d6acd2e8b1e748c6c0001043d759ab3f/karaluwowodunipe.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084b387c0c26---42274626350.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210715_214744.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afafa71fbc3---69298699050.pdfIn PDF document text
    • http://atek-ent.com/upload/file/20833111707.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608358c33bb45---tokabimoxawupipixi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/35fe01296340a729a27ac7c289259dc8/89417697757.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/zizozexeze.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd17b21c8---35979614304.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/38500912853.pdfIn PDF document text
    • http://fygl.net/uploads/file/160934301323.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/68568934706.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/sdsg92sp5p8a00bgf371icf2a7/94227739160.pdfIn PDF document text
    • http://aps-mes.com/files/file/8976085927.pdfIn PDF document text
    • http://riversedgefm.com/files/file/26510482082.pdfIn PDF document text
    • http://dzbnf.com/upload/file///37606726460.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/satutibutos.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_off0000c397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC397 16804 bytes
SHA-256: da271a3b27a7ac4da7b816ac3b71cd28d81a63bd74c43771fe15100a9b1bb62e
font_01_sfnt_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 10576 bytes
SHA-256: 2927cede79ec9406925c56f46e98c33f513bdfe80e12f3863d5e2634d604548c
font_02_sfnt_off000107a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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