Malicious PDF — malware analysis report

Static analysis result for SHA-256 0259cfb735d5a4e4…

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 12:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2388f3164baab9d489b62d0bea8b4464 SHA-1: f45ba5f42832bf89aee7cb8521216517b0c342f7 SHA-256: 0259cfb735d5a4e46f043dd7cb1029fe998f83e639ac6c2e6f4dd44514dfce55
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tobn56.com/UpFiles/file/55512535429.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30f491a69c---ranirareximej.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bba338ea80e---nogadejuletovuwerakoguv.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/xolanuwijuluxoponofigifin.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba66b6b02da---96343136603.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1327d6585---18564233792.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/kadetaj.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080444f74df7---76534725585.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/4433393461c12276f973da82acf8bf49/zekiferotogaba.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/266dfc5c68b15d97162fe90eff82a454/16091272808.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/40668599748.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/40069253856.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/b8b5c6bca3eadd88ec863b95bd009d13/siruzixux.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/pituxoje.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/datojegagaligurebosat.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/t5nqh8b2eo9q72o0o0far3lj0u/dedodorugufegojuxuvukika.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/muterapusi.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9sljhkoqel48c5m8kvj0kng6k2/degakojijogowujako.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/1656fc8247c2b22f89a31790683e8ca4/suzovafudagalebovurapa.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/86869578448.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/27657798607.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/fenunopi.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/muverozanojefojisob.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/7934205d05c44d2827c9a8d8a5c6a19c/tosado.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sneaky+link+upPDF 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_off0000cf2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2E 10140 bytes
SHA-256: 0aa6774ac525ae9d1f0aba4946b131fcd202677afc81edba089f22cf96a30a92
font_01_sfnt_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 20112 bytes
SHA-256: 47db8261f3ebb30dcd118cbfe2f4b7492754eed0b8bc0115df136aac9bb8b689
font_02_sfnt_off000119f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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