Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ec3e9197f26d5c…

MALICIOUS

PDF

75.5 KB Created: 2021-07-14 03:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f2db13955c86efc4319fa90b5d794056 SHA-1: aa854c3b8e2b5345cf65346145d3e7244ae023a2 SHA-256: 01ec3e9197f26d5c6f567911f3851adb9aa2de60f2c3a978dde97802a3b79183
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malicious content. The structure suggests a link farm designed to obscure the ultimate destination or to leverage compromised sites for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://cructi.ru/uplcv?utm_term=dixit+ortho+care PDF link annotation
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/12f1196142b1e59dc18e6ec851187718/89388402759.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/7b0ac9b642f1c47636056e194975bdf8/zorusavelaboxufod.pdfIn PDF document text
    • https://hoavily.com/uploads/files/39658773008.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accf131995c---59154438671.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/65935271622.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/78315671248.pdfIn PDF document text
    • https://ottopianos.nl/files/vobama.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/39391195352.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qf0hmiob61dralnsqllcplt7nr/46989429022.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608737193b79c---79105662750.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/af61a675ed298ec5e9256f0287374afd/11829529963.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/saak4vt62qg3a2fihc13o80hu1/fezamovemijixazob.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/wofapox.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6b1eede91---89857328119.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106151845093626.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/0jssmoal6ogd49771mqvihjoq1/palodemuk.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7ef1936e03c05312c86066e0f81a67a2/50146916757.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160852f04543e3---70755481109.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/558c1c9fb709029a92b2b8e17193cf94/47541969987.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/24353287488.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_off0000c54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5D 16808 bytes
SHA-256: 43940ac8226ca62426e30e0ad5961affd4d810a99285ab0f6a0f4163190ed72a
font_02_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 10112 bytes
SHA-256: b9de0890e9a6db88781f25fa05c9ff468e28cd4fec61b583a75eb118983b5de4

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