Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be8931ada8d5e73…

MALICIOUS

PDF

76.6 KB Created: 2021-09-19 15:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 956e2d2fbf7e61bd31515c324a2edd46 SHA-1: 7374af8319d47ec9923ff3deffa3ec712285df50 SHA-256: 5be8931ada8d5e73e5758a2f9b3da572a00d2a12af131f3c9cc5a23cf8cec703
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content or redirecting users to phishing sites. The numerous external URLs, including those hosted on compromised CMS uploads and disposable hosting, further indicate a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://crysiq.ru/uplcv?utm_term=watch+stick+it+online+free PDF link annotation
    • http://anhuizhkj.com/upload_fck/file/2021-9-12/20210912012511939086.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/botugesosizot.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/2501609407.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/77497399919.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/7f8c1f333513eb299fb2a1ca49ad3b7a/noselibivasebupex.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/lavoguxajifusizova.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/41915670857.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/54736176914.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/21476546704.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/jutokizurusimozozusebe.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/18497687159.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/mibiresalokuzox.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/40874221308.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/34077283631.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1613642bfbd7ec---22473045820.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca20d026dc---wifobiv.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/34058217723.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/41542312205.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/68824400989.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe283f402d---55412441874.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/gebifuteb.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/65920349333.pdfIn PDF document text
    • http://chapelguild.com/images/usr/zudis.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/25052637470.pdfIn PDF document text
    • 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_off0000c6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 17968 bytes
SHA-256: aa1c122c6243764b5800f199faa59574c558568eb8b608620c85b5db872fc281
font_01_sfnt_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 10520 bytes
SHA-256: 34391e31d559e0430c17e0f855ac81afd7d2809fd5e6ee093aa8255cf75f3c9f
font_02_sfnt_off00010d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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