Malicious PDF — malware analysis report

Static analysis result for SHA-256 69621022a1de3bf8…

MALICIOUS

PDF

81.5 KB Created: 2021-09-06 01:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3963d67697da6ac48f79e0638bd68a64 SHA-1: dc32c639d0dfc9fd08fc69748ac540a2e1aa9321 SHA-256: 69621022a1de3bf8762dd4eca598ec119a9d485e39c60d1e46f3bf706558c1c3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document is designed to trick users into installing malicious browser extensions or updates. While no scripts were directly extracted, the presence of numerous external URLs, some pointing to compromised CMS uploads, indicates a potential for downloading further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://mszukam.pl/dat//file/jalen.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/12156352079.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/17r355dfbbkkdvb4927d8gqdfq/kekejipegomeruporomi.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e137436209---10636302946.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/92099738467334eed542278f18530ea5/sesetuwudowizexonaxitufi.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/19224060834.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/80142833409.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a28c07c62f1---kozezamufabivus.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/4152501236.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/68211852581.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13540c706---95175629265.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/libanazipafisotadonuxuzeb.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fc77ed06761bb45c3864c31093b1c71f/kapakuvowelelulal.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-8-3/20210803102845371929.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/tisoku.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45c43a7568---tosomanafeteb.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7ead3e47dbc72752011a1c68f4d8c033/73473356288.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/5fe43154ba60cb69cdc52c4b51a21749/mixanoropatutotenoji.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/busiremujijofufunezu.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a002fc4329f---44962740146.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160700ec0852cf---lodekefi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a01fa04939e83c56a54d237e98b6ac06/16543437389.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/19706466716.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/495197a47d3431567b77ebee4a56a763/kezekubefim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=head+first+html+and+css+pdf+githubPDF 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_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 11180 bytes
SHA-256: 9a0259fd328119c29f665e4ffdbc2b2dcc502a8f911d4d1a730436209ed4ec86
font_01_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 17264 bytes
SHA-256: fea2db2f04fcde6a2205ca5cda65f5a8c4ca7bb959a5fac33a330abf62f05d67

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