Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47b4d3050790b31…

MALICIOUS

PDF

72.5 KB Created: 2021-09-18 10:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2db1db79fade6a267db64b491e6595b3 SHA-1: ca65276c9dba8c1e7b95123f2dfdca648075de73 SHA-256: f47b4d3050790b3166285289360e80824f059f5fb3620ac9aed4471ba0e1cf7a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple compromised domains, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://agrando.cz/files/file/toxetevibomujalixeje.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/qj3bgrjdh8sa9qv5kdfbjc7ud5/tutagotadoranavezunol.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109181023316260.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/56103665786.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/43171501754.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/49104247334.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/59816240421.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/tufotirakududibafekiwiw.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/33425290558.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/50180185823.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/vevuzo.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/90238392748.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/norudifilekele.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/57017477316.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142a020a8ca2---8599953727.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/19256380921.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/8a43486421180f0e339f875aac1a9928/fopupuwigupilelevufuvizap.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/45a52612dbaaee73d85f51d9e16779bd/24356311615.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/79533490868.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/07e0b3542296589c1aafb06d307babf1/44403297884.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/94091111495.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/pinazoserujolot.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/muwodurojef.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/94091444696.pdfIn PDF document text
    • http://shamayachts.com/upload/file/13408931296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=clash+royale+apk+download+2021PDF 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_off0000b8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D7 16412 bytes
SHA-256: dd02ac810a2448bcfb41ec87ad862f5b778e578c8ff2f7a1ce9f9f0f5f80718d
font_01_sfnt_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 10916 bytes
SHA-256: fe5141a81ba566c9ca3190745ece322dcc1cd0826795a6e317c911f51f30ff18
font_02_sfnt_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1