Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de7e3b9fe61bc2d…

MALICIOUS

PDF

92.2 KB Created: 2021-08-03 14:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f2fed193a3beb860862f513184a7b8b SHA-1: c03d3a8d1c79ebf9e841946db9e5a5de2f67f790 SHA-256: 1de7e3b9fe61bc2d7f88d8a49c8ee0f5082691fb3145ff1a38ee4f5a673e75a5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/gigisij.pdf In PDF document text
    • http://circolonauticofavignana.it/userfiles/files/27590032996.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/6434224574.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/taxizoxake.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f3ce38b20a26917c62109287375a398a/96872045739.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/falebibigoti.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160861862e3d44---91808876625.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/95221046820.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/e5bd44kidvvcvg3jvgb2hnhamg/71826943476.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/25093031588.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16079d46633445---jazazeputitefinexegawaros.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/97198fc190549f0b398443e147affd8e/bigovusefe.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160718d8e63a46---28615536020.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/vabiruvibafigozetodilemi.pdfIn PDF document text
    • http://ropesadventure.com/d/files/77634276496.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/90750220757.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/94871347893.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/bedoditejalajur.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f117f19244---65648676886.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/0e69faf2c1c1bde1eee968cb8264c055/36169747405.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/suxewetoparuropasijagesol.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/18995919207.pdfIn PDF document text
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/92525443869.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/1llh4kjrve8cfntq40jea926dv/godunireloza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=prueba+moss+respuestas+correctasPDF 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_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 10536 bytes
SHA-256: ddc0c8ed1fa389d2e0d1526da81814cb319de92e85f132376d7c9249e272557f
font_01_sfnt_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13165 18280 bytes
SHA-256: 5f16501bc9dbeceef7a01fb409807acb0ef1fb35822555f20aa5540e0d994d13