Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce74550b7458c1a…

MALICIOUS

PDF

92.6 KB Created: 2021-09-12 20:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: efb3f037de56f09ec3efe0c21aff57e7 SHA-1: 5dc44c558b0977230bcbb79680ce7ed12f8cf358 SHA-256: 8ce74550b7458c1a969b90346218fdf7ee6c0695a0521a61fe8875229ddc34b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pixomot.ru/uplcv?utm_term=it+full+movie+fmovies PDF link annotation
    • https://mtmnetwork.net/uploadEditor/files/4705062961.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/76707937912.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021091015210773499.pdfIn PDF document text
    • http://usateatop.com/_upload/files/85878461513.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/mofebotapujapekuxa.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/15751627818.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dfeb27d44---71764810667.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/lovum.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/fb79357a8f48ccb5035fa3590c0ba4eb/65621805594.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613510821cd63---tosozelegeganad.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/7405941743.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/zisafasemope.pdfIn PDF document text
    • http://atamergranit.com/userfiles/file/nanijabopesidelovoguf.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/votegexalatuzulu.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/notaf.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/dedofesunivepebeki.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/bamapowiritepagetasez.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/72679122845.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/poxoneva.pdfIn PDF document text
    • https://maturana.cl/upload/file/gibatowimux.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/vomologupemefezaz.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/51811471161.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7afc3fbca5153bc5e548c822371998a2/35401068878.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/6597365845.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_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 17228 bytes
SHA-256: afe9580474432db6f0351e8c13de394ed5bd126641ac1503038543779a672573
font_01_sfnt_off000135fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FC 10124 bytes
SHA-256: c5bd4f3cc1aa07762da3836ff3e5e5f670d0b936e6355e2a198e45c4225eca3b
font_02_sfnt_off00014cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1