Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc5eecfb10486f4…

MALICIOUS

PDF

81.9 KB Created: 2021-09-10 12:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5d9e0f3dc814f9e942ed903521cad189 SHA-1: 11bb88a6ffdaac10883ebc82ea9f0adb4cd3cd4f SHA-256: fdc5eecfb10486f45bfb76d51686c9bb4bd74fd684d4ce45f7d38f26076c9d1e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://facilitymanagementassociates.com/survey/userfiles/files/66389548390.pdf In PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16134dd1ec67d8---17963585251.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/161394d104c6df---lowaki.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/48466999113.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/fovulovawus.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/vitukupos.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/23664216734.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/tipelawajajoroxodamitaben.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/33616319616.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/57745176297.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202196059122711.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613704bab0f7d---9972215156.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f8e41a26d98b220fa6f65276cb352049/83743171818.pdfIn PDF document text
    • http://exima.kr/userData/board/file/doxidabuxasake.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/takukibogopu.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/79348077654.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/nujigizidobonovenumuru.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/jonafeboziguw.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/24876264729.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109100527274034.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/netigekox.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/12498549479.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/wakomuwajalomonelux.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/25796445722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=high+maintenance+web+series+watch+onlinePDF 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_off0000db93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 10896 bytes
SHA-256: fe534c83a0a5c82e32b651eae97d2a6a9ff3356066b01a526e79fdc275acf4b2
font_02_sfnt_off00010cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 17472 bytes
SHA-256: 1a0b3258260b673d573734af85f8984ff2c366f0db2ce42fb8995d887e3c503d

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