Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f387692172943c…

MALICIOUS

PDF

69.4 KB Created: 2021-09-18 00:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b522765d2b9329708aca0c0ef3098390 SHA-1: 0a9ec51ba48c637b720bb97c62a142197cf2ade9 SHA-256: f9f387692172943c9a82a710b6ad6cf8f89c64ba5bb265f1abd6f62ee8159647
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which are hosted on disposable domains or compromised WordPress sites. The embedded JavaScript likely facilitates the redirection or download of further malicious content. The presence of a link farm on potentially compromised infrastructure, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://studiolorenzoni.eu/userfiles/files/ritaso.pdf In PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144fa0f5b608---fajezutivuvimen.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/52768190568.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/86118357925.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/25794802687.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/jupofewi.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/14287436160.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/9139249838.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145060452773---17855055341.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fe2ba60b99932500a59c57e5f0afbf78/nabewiwebovefikibokadox.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/24730475762.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140f8ad522e2---vozejijukofuvomivus.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/89e585863fc23fe00999926c5f8bd1ab/17079780853.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/mamudojufijogajezo.pdfIn PDF document text
    • https://cebrium.ssnn.ro/images/20335282692.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/35527550309.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/49943492396.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/82272798566.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/24567965126.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613396f2c133e---saxixema.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/somaripediniku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+8+ball+pool+mod+unlimited+moneyPDF 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_off0000b1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F3 10936 bytes
SHA-256: c4afdf74a318fda882d2427242402e449bb23e6d35ac7965c8f3911286298203
font_01_sfnt_off0000cb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB18 14664 bytes
SHA-256: e6fa2a74aa38988a5bd937adac2aa4bedd14ebfbbf60938816826edf385a2601
font_02_sfnt_off0000efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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