Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58b623478e20a7f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-14 06:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e06d6eb632bb13b8339df3e3bfdfc6f SHA-1: a88ee452f5e58b02ac859da1e5822f718d052aa9 SHA-256: e58b623478e20a7fc35e0f22873807e3d661c039aa969d92ea8feb69940d2014
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that direct users to external sites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://mimpiindah2.com/contents//files/35477775322.pdf In PDF document text
    • https://noddy.nu/images/file/ketijedogetozirifagirula.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/93788783493.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608b556729450---63448181736.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e96d80f0223b745887f64bf734fef82f/63556811985.pdfIn PDF document text
    • http://tort-art.ru/userfiles/file/lubejewelixelikorub.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/97729985271.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/86754780627.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16082afc909cef---61668950113.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160872c2d14982---50733689198.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/50570975808.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/5539408135.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/70d2e858bbe37023020f26646eb5dd56/15230117852.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/p65fb4lbo4ufrnq4umfjogat0u/kebimerawamo.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab33d11cd57---90340433527.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/49138096387.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160e4eb4ec783b---59747427757.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/ec2c6e75c9b3ea2c8cc7567c0c182cf6/simexalomudejopugito.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa84bb02db---fezumudi.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/fedezabegobuzusega.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/542758729.pdfIn PDF document text
    • http://hodori247.com/uploads/files/85530370632.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c93e7761c93---vuwuvurikeveveximop.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210613_15C242A3F5D9EC16.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lotr+fellowship+of+the+ring+extended+edition+watchPDF 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_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 11044 bytes
SHA-256: 6b5dff58be8e6a3d5cf27e039853356a9b00fba9b59ac4c0ccd7810651e8fe48
font_01_sfnt_off00010745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10745 17820 bytes
SHA-256: 5cb0b1f1edd2f8c209e84e268c539e01e35690cdb22f87ab1d2793f1090285bc
font_02_sfnt_off0001362e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1