Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6f967ba3787637…

MALICIOUS

PDF

134.8 KB Created: 2021-09-05 03:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7cbf2beaf86675a33da9f8b59f6ef21c SHA-1: 481c77a9f451f5f6615065d3a87c57e5f27389cf SHA-256: 9b6f967ba378763725b0c5539b1f3580496d153936cb7f3793b979f445e2a1fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://thamdinhgiadaiquang.com/img/files/lojugajesonowemonuxosa.pdf In PDF document text
    • http://rajasthanmetals.com/userfiles/file/paxux.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/loxudisaronu.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/zirevi.pdfIn PDF document text
    • https://ksuskalology.com/images/file/9075600499.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/koqvnsoj73auh4v1vashq7esi7/50964867901.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f6c35476ae0c747cb52c31edfbde850d/10890504739.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7dfd008e0318ca4fcfc81578f7a884cf/99392234846.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160888fbf380aa---67446565433.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/legiwexabifinatiw.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/balomosotijuk.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c8da011f22---40016766708.pdfIn PDF document text
    • https://anfauglir.com/images/file/sufoxejuruputofa.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/35502840726.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/dc613a332a805a106c72c5460c9a6db6/vatikaluz.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607886171559e---gowat.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/jozan.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/84429398596.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/97548277290.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/2aqna9r9eoj4d4krbl55c2fhkt/96726922126.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/3728366845a82fb84331e9c61b930c2d/42979210236.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/zesilarirelemidipamukol.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/nuvikaxibuturirimazuvifof.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/82875005564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=stone+pelting+in+kashmir+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_off0001a7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7E9 11112 bytes
SHA-256: 60dae7b108476efa693bfb328992ed1329fd099a7fcd20e369f60a83338f759b
font_01_sfnt_off0001c169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D97B 19792 bytes
SHA-256: 7b25bf272bf7c50642d17c7521f93b73c1cc95307594b372eef67b05ea405417

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