Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf3f483af85abfe…

MALICIOUS

PDF

70.8 KB Created: 2021-09-18 16:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d2c01122c727c5d68269bbe093ddba6e SHA-1: 3aa7c4b4c95b88cc7e30bb54aac4282a49fa6bf5 SHA-256: 1cf3f483af85abfe35ed83ee46d2612250540df89a5fa2d3f8e6c524c9b3c0c2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://selispin.com/calisma2/files/uploads/suwizuforan.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614394a7d7dd2---zexugaruwipinu.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/76071031968.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/mowodezus.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/sixapatapa.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090812474873499.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109161703551154.pdfIn PDF document text
    • https://renetravel.ro/images/files/56284648081.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/4155150156.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/saxinenidumu.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/84607181396.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/49920691242.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/39762337888.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/gojuwakifamo.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/riwugedibowipodafurileke.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614587214c0b7---31156525979.pdfIn PDF document text
    • http://888chji.com/userfiles/files/dadud.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d5c3a626f---38955181041.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/65908804099.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/jaxox.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/megesubegoma.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/39587168129.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/josetadorofuwipesunisuxim.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/wakilimolisifite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=fifa+14+psp+emulatorPDF 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_off0000b426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB426 15920 bytes
SHA-256: 205658b366a92e5d8f66bb0cc151784b035bf4ab9bad80f54af55b2b011002c6
font_01_sfnt_off0000dcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 10620 bytes
SHA-256: b86bb7ab35bedc749709814d3751b15252fa1c32edfb2a88d4815a7447b26ffe

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