Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9c0ebd12aecc8a…

MALICIOUS

PDF

97.4 KB Created: 2021-09-08 08:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e862da16e0a6de02883751b82f367a35 SHA-1: ea234ed29c83d8c04496e3ed0d0586d0699a4774 SHA-256: 8c9c0ebd12aecc8a25e219f896e56a3b6cda9c984c431157356bd4d1e146d0ac
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://baobianhkhang.com/upload/files/65476064888.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5330b892ed---43559120787.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757e7b1bc20---kolidukevukalis.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/gukakivekirupunufegosinod.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/30034061464.pdfIn PDF document text
    • http://exim5.hu/_user/file/13359406060.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/t1u0qk1dc72m4r1olp85poho1r/zurirotewiduvadeben.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/74783032449.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/a3c5d94b782a66e1721632dd57379471/58473153996.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/lazumalarobotanal.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/lifabapulumir.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/92605283279.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/31493081760.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d99cce5292---guzimajeludonepomedezem.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/74363440841.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/57062a639cb2e7aba848e405f1782167/zifedutofilalapixepo.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b487bc3f3---48542528079.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c220e758137a737af2a224b59e67eadf/98094443584.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/6410154889.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/20785119445.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/41096164336.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/fazefutuwadatomutixigisot.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/xozevexejomageraxelolax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=abelardo+y+eloisa+libro+pdfPDF 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_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 10524 bytes
SHA-256: 4751c74ed86999cd96bee1218727f87b7a6bf0243e8ac0478294a37c88832e3f
font_01_sfnt_off00012a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14236 20744 bytes
SHA-256: b8dcdfa0be8e31d86919981d7e7b5e1753295577a42eae5978e8f7779655ab84