Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6e2f01b0cb7ebb…

MALICIOUS

PDF

86.4 KB Created: 2021-06-29 02:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aee7f968c7896fbfa8e9d07ae8466d8b SHA-1: b0798fdbb2dbfff23629ee1ace94a6a7966fb39c SHA-256: bd6e2f01b0cb7ebba291721bf2a3a7e3d7cc312c416d987b43a70c95b10f983f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://picassogift.com/Uploadfiles/files/sasuvazisifafugekut.pdf In PDF document text
    • http://vinmexindia.com/uploads/tatakovazitowexafabexaru.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5a42fad1468747130a0875ae51ceae53/20090802195.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b759268d316---32563681111.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/98844410676.pdfIn PDF document text
    • https://luminex.pl/upload/file/tugupogaw.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608af9afca2db---31880483559.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/99a7c74112d9ae8ec3f040b811964301/35310625270.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/56901573994.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c49ad7afc32---govari.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fcab8fd9b---dubekovorozelerizirizogi.pdfIn PDF document text
    • http://huiking.cn/uploads/file/272257241702.pdfIn PDF document text
    • http://abnicum.com/files/file/vixodepalemilisos.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160759a5a2eb7c---20895265255.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca2d592e6---niwelazomuwuwizikowilinok.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/7a73df11f4667dcb30de6e3a2310ed65/91768288999.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/wepolakazoron.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/zesikofutifuvofibugu.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/fisikafudokukukugovizeta.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b29dc0bac06---sabovetasulejulamureke.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/i552r3g74qtvqd5s6pvtfhli91/fijemixulewujob.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/xeliborut.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/40dad753f070db207d56f7ab3e70661f/ralebedo.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210625_169327503A41BD54.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/vuwimukuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=class+9th+english+chapter+2+question+answersPDF 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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 16900 bytes
SHA-256: e386f5ae439992e75d56ac41afb51923915476694f181db280b9b2282ef8ba5d
font_01_sfnt_off00011973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11973 11304 bytes
SHA-256: 6a74843fe3315e36452564d9fb1a572e0c7bbbb54a7a4c954e99dc1e3481793d
font_02_sfnt_off000133cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1