Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ef4b8a1bc79fce…

MALICIOUS

PDF

94.0 KB Created: 2021-06-28 15:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 071d52e7d327866c9dc7afbe552b3bf9 SHA-1: bff2b7f66e998a6d5056b23ea53fbf12aee92dcf SHA-256: 01ef4b8a1bc79fce35d95cf54feb13c6556ccaf9b8cdf20c16cca06c440424e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of a 'download button' lure further suggests an attempt to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/7e06b88e7904cbb81409876c09b31a6d/59546712541.pdf In PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/4116095425.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa5a1ea54b---54264363482.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/28569934720.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/lifuripovugapofovim.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fdd22c6c2---83576687084.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/59878770972.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/79960605093.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/15214219881.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843da8f0338---jalis.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711d9e3622b---50013400074.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/fizifuvuvujedapubolaza.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/nokiputileleriwexawesixef.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/84107167683.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/drod11jhdrdmg6d3s52nclvun0/23499298397.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ec9e8c77cd98be8ccbff2127a3335ea4/82058099476.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16084ed221f5be---99603986037.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/dd3db2eaf3319814ae0818f1a4874935/dojezotedakepuzab.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210621150904_srs1go.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/nukiluwigiku.pdfIn PDF document text
    • http://candientushinko.com/images/file/92692675264.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf49fa4f56---31771492922.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a497b4c266d67ca6fd8bd4f2bb28567c/7442037218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=kvs+admission+form+for+class+1PDF 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_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 10516 bytes
SHA-256: 5b5d4de653cbfb6eec07be76b7d9afc518b2425eb7bf3069fbc582968496a54f
font_01_sfnt_off000125d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE6 17204 bytes
SHA-256: 65e897b91a3d830b49a7a8d76993ad6d31cf7faf1dc978028566d0ccdec99aa1

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