Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a979b9a2e082b5e…

MALICIOUS

PDF

73.2 KB Created: 2021-09-08 08:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3eeb88d09911b344b0d31ca4fa5219f0 SHA-1: a24b7cd6550d7e3b72d9eddb884ffe364e210b39 SHA-256: 9a979b9a2e082b5ea852c047d640ed8751cadc8964259dfb82581cbe5b96867f
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple PDF link farm heuristics further supports this, indicating a deliberate attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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.
  • 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://eliteplacementagency.com/uploads/files/rezejinoxenumukuguxowizef.pdf In PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/4a66b253426c70523eff55c6be6ca351/wosaxuwejegenovepelumoni.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/2178764915.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/juneworurawi.pdfIn PDF document text
    • https://edarky.net/data/file/tudezikir.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/bcd752fmv7v1g5i3fq2o9b4j67/memorudavakoxawenenejul.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d6c6d6600---23368527956.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608081508132c---16480611367.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/kirimubebujovazilazuji.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/fudutodezefedijomexawan.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609017f4e7f56---konalubulodunufiko.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4df26cc7e7ab0f5ba10beb536f1ae2f9/36981484346.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/duxekibimeberefetamebef.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/81c195641232aa4b5f7fe428da0e2155/kikaguzugodozudijajuno.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/58741766954.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4a7f55701d6ded44aeffd9e28d4fa6fc/siviludem.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/ketebef.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/namesatutatiwase.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7616099d2ff368d3739fe1fd0d8da85f/fatagadanamivifide.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/melijfcmk5l8upe7jm9os7abd1/jotig.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/b6e19352c6fb16cd8c38aeb8d838129b/39030486656.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/13868359825.pdfIn PDF document text
    • http://debten.net/UserFiles/File/dixidegupezojixigepu.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/61976384324.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/selofososulifarew.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608727b95dc4c---diperutipokozizuziti.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/50544938105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=phrasal+verb+worksheets+islcollectivePDF 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_off0000c08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 14788 bytes
SHA-256: f3ce62604ccf281e3097e271a02e55bfac7adfcf45aedba63dae0a36fe8167c5
font_01_sfnt_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 10608 bytes
SHA-256: ce777d03d1f02e708f1c0084da70946311f4c18c677a04afff9d0d6844c32030