Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4510dcdb28cdc6…

MALICIOUS

PDF

80.7 KB Created: 2021-08-12 13:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 53e79376d031811e37d0162d27bd5dfb SHA-1: cf53a6005f71783459592951c76b80bd3646bfc3 SHA-256: 2a4510dcdb28cdc68bbb022b6c8a5f34af8f49a5451a7adfe27f6f88b0fc7c13
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://itracmediav5.com/ckfinder/userfiles/files/87897551362.pdf In PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608061a321a33---58446715659.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/zavetetutij.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/38055363405.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/69887630426.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210718202606.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf2602199b---61435270801.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ec7685680f1d797b9cbe04b9429134a9/72600958927.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/bh8tcecde93en85vf2i9n26m21/menuzejanowo.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/tilofexuputiga.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6a479cfb3---paresujovosum.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/94168759175.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607602d3d7fb3---powijafilofiv.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/990ac3c9fd20a35cc8474dbef1569a4e/fipafenobezelopoze.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761d3ccf71e---59847168147.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/jebafebunofaje.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/pafunoluwatikexoxexi.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa5d05166---32955433787.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162355407165.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0f1692a29ac52ffd40f4d1fcdf977b92/51541831848.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/geselixoxekodaxumufemo.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/35842651819.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/gopixevozipinejosuv.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/7g9nt638me13hc816dlrdjg1r7/60266827469.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/95823379189.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/77653877883.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3tf2dfelq0trqq4qd2mqk2j4jv/vemefojuxij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=maths+handbook+and+study+guide+grade+12+downloadPDF 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_off0000d3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 11224 bytes
SHA-256: bbcb155f5d9dbb432630e5eff012d59074edcfe88ea54b2ea54937064a9c84c3
font_01_sfnt_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 17296 bytes
SHA-256: 7290cc8b1df10510de558dc222e58498baa1986dd18fcc8388ecc572c0583350
font_02_sfnt_off00011b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1