Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cb1afb90dac3f0…

MALICIOUS

PDF

89.3 KB Created: 2021-09-08 07:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d409af4b38d5d9b3e456e4d6b325a1b8 SHA-1: 32d2702286dca4719e913fc5306ed31f1824f60f SHA-256: e9cb1afb90dac3f0455f8a6d3719feedfc18ffe820227ac71438f99729e91be9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or initiating redirects. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress upload directories, suggesting an attempt to obscure the final destination or leverage compromised infrastructure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fbrasil.com/userfiles/file///58108234938.pdf In PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c8e45b996---74740711340.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/54387889730.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/86390552548.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/gisopusawiviv.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/ee33846f5d9649cd6521cc15e13739d6/71749358651.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67bc227bf0---vevovodevera.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a7933f2c3---34084301526.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34abad5dd6---19098368599.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/74775194114.pdfIn PDF document text
    • http://fruitvita.com/files/files/67587999525.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/dobetikufuso.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/84366075228.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/f56ca5mhtk9aq74pdvu7nreuo4/gelukewofufideravamegeju.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/53165753746.pdfIn PDF document text
    • http://nprofit.hk/userfiles/fezulelug.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/panonigoborejifisu.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/512d3c9a09b113c4dfaafa1009c5aa8a/wixilomoduwepimub.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/dofemalodabadilukuke.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/77472951180.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d96ac193f6---37472278817.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948e96caed6---faxonuruxe.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a287291ec10---nilobepodumelesikivajokit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=balancing+equations+and+simple+stoichiometry+worksheet+answersPDF 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_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 18012 bytes
SHA-256: 678062b07c72280ab88bcf77f9fd43f2a156336f49415131d6eb83631a45242f
font_02_sfnt_off00013c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4C 11552 bytes
SHA-256: 66cf1e818d114c04374b27dd649509dc7666d6894988a838a179980cd7837001

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