Malicious PDF — malware analysis report

Static analysis result for SHA-256 0235e5e0707401d7…

MALICIOUS

PDF

79.8 KB Created: 2021-09-01 16:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ba149b47a47bd2309fef4f57689d00d2 SHA-1: 4bbbdc57d966c2c248317e532f7385e3be91030a SHA-256: 0235e5e0707401d7e9ac551c848f328bdecfe8a10b4f66794cefe92e5c2c9767
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or lead users to phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/56f7596313f095fa2cad625b2e5db0e4/8846442967.pdf In PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/a819ik9c0vhorj79vq0126gg2r/sorifipok.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1345cfeba---12960823775.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091fcf512b16---71899242993.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c541945281e8967266eff4549bff0451/suvunut.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/mopigimuwonajoji.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/bosovipo.pdfIn PDF document text
    • http://sns.hu/_user/file/dinitajegen.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a69fd6315d---fujujububizu.pdfIn PDF document text
    • http://inglewood1968.com/clients/68690/File/xinasod.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/63975662534.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/josufovuweker.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/kowasutatatexixasov.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/27013780750.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/zolejopobawivun.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/saruge.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/24428814329.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/203cac18e6aa86612f113eb3af3b3fa3/tufazixobomesozesop.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/zuxisezubotojedo.pdfIn PDF document text
    • http://canvangdientu.com/images/file/zitujevatopupetese.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-29/20210429050421560842.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/0fiagva1h422j0vikagfmh5385/76486559422.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/nadokukewafotizafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=pretty+cure+happiness+chargePDF 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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 10704 bytes
SHA-256: abd077694d61828628126ca651485e2cc2a1efad4d202f4276668f636191d787
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 17000 bytes
SHA-256: ac8327ab0f11489bdd7a3dfdc50ea1e13fa0a42a6f4c4fb1c66ff15555cfb516

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