Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cba54d6332cff0d…

MALICIOUS

PDF

105.5 KB Created: 2021-07-15 21:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 20f116e3226d70854a56c06ff49e55e8 SHA-1: eddcccb3c3eaf0bd750e0600bf37daa5571d8fa8 SHA-256: 9cba54d6332cff0d9961e55bea6e117ad021d8ae6e3bd49b05aef6c60e34130f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress upload storage, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the link farm structure and high detection scores point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/1945bb888f90cd1778425ffe8493ad19/56191833029.pdf In PDF document text
    • https://777mto.org/contents//files/38604749981.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/67459899851.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/40005417777.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/83525113258.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089a1dfde214---gasikuw.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/lukojakupanuvimefilo.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210505142104_676817659.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609f32f6cf6e3---jozazijamidumekisarododu.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/28e2a58f45f15eac040754d651c4ac1b/91338361499.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/deb3913e0f23b117bad6f82f4973ded3/26844704935.pdfIn PDF document text
    • https://dvg.asia/ckfinder/uploadfiles/files/beviwobi.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cefc93ecf---lemepibexinaki.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/68804660094.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5eccf7c1ec---livebefotuvojasinajewagon.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/sjrhn1i1lgk3s5ukslh1app31g/minumumemosafaribagudi.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/afa76a8fe391770b55ffc64e8bb9423d/pitesimekubevokunotibufi.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/52649119092.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/r9andu27gk0htcmv676bc8dpcm/logepukidaper.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc5942ca2c---93706448571.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/puwunedoda.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738e70e9a18---67880156932.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/kvar2kagcha0ntahmk63d6ustt/79072363486.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160770057eee99---merenubupa.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/vj6c7u8qunajbhbupta2s6c0f0/jabimunekalitogi.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0fa2d96dd---gemekuzukaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=energy+and+society+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_off00013a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9B 10844 bytes
SHA-256: db968e7893abf6b8d04db2020c5cdc54fd861e0131cf86f3b3ab3743171398b9
font_01_sfnt_off00015395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15395 17172 bytes
SHA-256: cdda051f295cfc67131bda651c2cc6f01d4667686f3c64bd3e4c5318851c1840
font_02_sfnt_off00017f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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