Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc3edc47007b5f3…

MALICIOUS

PDF

76.9 KB Created: 2021-09-04 20:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3632d61a271c669a13472144fccaa8a2 SHA-1: ed783ccc6ad3d556104c41db70564f15e73d984e SHA-256: dfc3edc47007b5f3c4435de99ff7ab2854f15f16728f79d64537ca26083b1ba7
172 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous links to compromised websites, indicating an attempt to trick the user into downloading a malicious payload. The presence of a visual download button further supports a phishing or social engineering attack vector. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 8

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=ssc+hall+ticket+2018+download+pdf PDF link annotation
    • http://eviljoy.com/UserFiles/File/nekurevowor.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa65a69eb03---43627502142.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/73598583489.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c648b8b495c---60094409490.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/denaluzin.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/95b8046404908b829ee19d312f6d88f1/13239407927.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160d25ecd9c767---wavokozilaka.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/96717951982.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/15354420085.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/vebagazamuwilexisafik.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/32229071264.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd88e9c0db---52072484296.pdfIn PDF document text
    • http://sksound.com/userfiles/file/74662594289.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/12c8787666a7ad68ae9d92bd2a485122/fexovifitik.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/nalutanoregiluwibene.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e39c2298516613bf2b811a37beecb90b/nivezirizimaxagajeli.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/sikibavogisa.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/jijitamupuj.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e4b230b0d---75245881682.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/10358312217.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/kelexewezulikinatal.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160716b689b45e---44845420648.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16094abba6e8a5---badijizataxe.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98f333c07d---kedamaxudibafumufuwenila.pdfIn PDF document text
    • http://brukbet.com/user_images/file/sedanotulejixikidij.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/h8s41ckiptvfb6edlq61rss3l5/zopidagokepebupar.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/d321ab7afef4108de1d7818de9590769/rugisidexemepojasiz.pdfIn PDF document text
    • 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_off0000c692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC692 11372 bytes
SHA-256: aeb0e05e7ba1909746b20c716bb7d11292c425540caa0833a174b4333d600c5c
font_01_sfnt_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 17244 bytes
SHA-256: 2b7d16c36ac4983be30fc3ec6a8511200c319824e58a738ccf2d99e12ede8cf6

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