Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22c5f02ec96912d…

MALICIOUS

PDF

85.0 KB Created: 2021-08-04 22:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 21b89cfa960076a314def2e7a88e80c5 SHA-1: 5cc9329589f131ecf1658b3f7195cebe6de414e4 SHA-256: e22c5f02ec96912d88d78fab3195c4e379f16d26c4c2d911271e5d6c7b7347b6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://synerhu.ru/uplcv?utm_term=dios+te+salve+maria+letra+cristobal+fones PDF link annotation
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201da9dd71---99810254645.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/wupebovibejidarovojogelow.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1256f1332---somoweki.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/daxijujowivunezulume.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2510cdbdb1---43609347003.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/2e130b3a0d8076af6ab967477648835e/xuwosoxem.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16074c46012860---19544682912.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/67192289496.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/73521785812.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a446a5be6d7---titujixelubetodi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/84529496001.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/dedopamataj.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/8af5370310bad4c717c6e6c383df190c/detopoporimanolurugugek.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/logetomamo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edcab158685---17186370388.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/zogeturejebujaba.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0892964be1---dofubukinewejenuku.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i25m5a3463l7bnflg6kl19ar45/57858577688.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e9d0f0672f097f3a2ecc0a9439bb83ae/jobef.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1855204b81---vekonijajawoxatovuzivof.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f82f755296e989939cbb8ac79d29c4d1/62462886693.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 17512 bytes
SHA-256: e7db8c1b805b638c94a6da43e780d208e0eba81c7d2d9652c96067fedb73d678
font_01_sfnt_off0000fce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 10704 bytes
SHA-256: 8a34713b72073c5269db760dc1bd089e0735aa814d414e7ff8731dd58cc11d67
font_02_sfnt_off0001157a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157A 16364 bytes
SHA-256: ca2602d65a375fbe02fa3e7c81e1256e47710d68609654fc75c88204174a9643
font_03_sfnt_off00012be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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