Malicious PDF — malware analysis report

Static analysis result for SHA-256 7280841e29083d03…

MALICIOUS

PDF

90.9 KB Created: 2021-07-24 15:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 544437808eb522234b64ac0c898f2f4a SHA-1: 72a01de86bbb5ae4fab8445186b0dd2781445974 SHA-256: 7280841e29083d03f65f97d0e1c0d8fa0886af1d7db4ac3c4eb1b49ee1d2a43a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, many of which host further PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing malware. The embedded JavaScript is likely used to facilitate the redirection or download of these malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c695a3679---91679647681.pdf In PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/tigufedem.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/073bcbaaa7281bebfee620089ae8e031/27729446559.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210517151821174121214.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11af9ab0dc---xivebojenif.pdfIn PDF document text
    • http://lyshiying.com/d/files/8748539833.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/fexamobaw.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/32324085095.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9e3d0ff7bb462ef26d15e6754cb29598/19705090123.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1kva8lh5k33e455jk71sfkesru/nipufizavo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/a5285e9265323dc2c66339fc23b45e82/fagoreluwopudopokozogebuf.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/lofibebevodikijasuvi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2ef21772---balukupon.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/bf12cc810e2440a08500e162bc728bc1/xuluwesumokelo.pdfIn PDF document text
    • http://cosyromania.com/media/file/52536452002.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/32106392745.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///55209140186.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607eff4f6ac5d---lunakijoremavumedun.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a94bd9969---61194757916.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/47948276042.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jc7nubnj3cl9c66guvdvsnvmqa/28452415536.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8759da86bc---bofomok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=prince2+textbook+pdfPDF 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_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11830 10692 bytes
SHA-256: 9858d1e55382666145cf7774c0a0e0977cd097ff4ec0a06c6b8dcb125f48a546
font_02_sfnt_off000130a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A3 17272 bytes
SHA-256: 82d9d9e8d28ae6bdc5a63b6e8b51e4853cfebd74cec74e81c59a4685192b645d

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