Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1e2cca068a6ed5…

MALICIOUS

PDF

81.7 KB Created: 2021-08-06 05:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c594a51131ded6ea4b7b231dc4cffbe6 SHA-1: c61ddd0df48c25c1f1458bb1eac5663fe2a1432f SHA-256: 5e1e2cca068a6ed567d8405847239bf9ec85d2488aeea3b50f76f09c1f5decda
124 Risk Score

Malware Insights

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

The PDF was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to other PDF files hosted on compromised or disposable domains. This suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4456

Heuristics 5

  • 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
  • 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://kingcraftviet.com/uploads/ckfinder/files/52276267389.pdf In PDF document text
    • http://quangcaosms.org/media/ftp/file/zajokanolapise.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/gupelefef.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/90702158348.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/a131fa287ac19ef5c8b0b11552ff9ad8/kedegelibotawir.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/40801507224.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/87389825573.pdfIn PDF document text
    • https://dacola.com/upload/files/51731959844.pdfIn PDF document text
    • http://htwy.com/upload/file/toremowibomajodawiminuxa.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/8a1567d0864b515a78804c3a7ece079c/49557362291.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f30b16d372---gutafizos.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609666e4e97b6---88852473808.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4ksh5plm62jh9b49rtpotkg1c5/bejigofogebixif.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/7775533587.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/31ac654a6b568fb5cc68b0f245cbd605/63429007283.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/kutireberip.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608350ef620af---bitowipe.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/bddaf3ac88e3b6fe963ed0dcefa154df/88165287598.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/zorabas.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7955c11ad6---walerulerazufi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607373b337df9---kekage.pdfIn PDF document text
    • https://shidoremicrosys.com/media/peginuvumufabi.pdfIn PDF document text
    • https://avela.md/userfiles/file/migojalu.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/47d64a08f4c908930a5b7697c5b279b7/waselarusujobu.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608502f88e3db---75283023039.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/wilopiwib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=can+you+mine+bitcoin+on+android+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1