Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb0a957a2fe5a6a…

MALICIOUS

PDF

87.1 KB Created: 2021-08-20 05:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 713a52d7dadccaf22b72765a9b24e397 SHA-1: 0d3ef54425915dce746c405c8116e7926fe2759d SHA-256: 6fb0a957a2fe5a6a9c259a0fb26aec9ecce87eabf8ab326235aa56699dbd9c01
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a4653b82f---67703578222.pdf In PDF document text
    • http://pantryscan.com/123cars/imagefck/file/pexilemujirinifipeda.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a863c4d8018---radegukujudojozofifavopix.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095c53793762---wudogu.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b09cf138a99---82053897821.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/fea2aad4bd7ef93aeaf4ec75040c06fc/63081393825.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/wufazogesaja.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5f08c0cbe---sixijiwitar.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4668b9279---25414444397.pdfIn PDF document text
    • https://emmaushuis.org/pages/selirupelejapariga.pdfIn PDF document text
    • http://panteres.com/files/files/zawodifurukugaginezekakuv.pdfIn PDF document text
    • http://talleresjpg.es/img/file/joxujaw.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094a61e44939---boporelozonexetudidajur.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/90480558039.pdfIn PDF document text
    • http://rafaelokazakov.com/file/wovak.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/b968327bec3c5fcd5601e09c1bc7e1b3/nerulajotonomizojepefa.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/aceedaffa23cc91de7630ba4798e8ce4/sopumisu.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/15119251226.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/girinagu.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/jelivasof.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/nagaxugoxusikorepeb.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6217aad9c---velatanodomodiliju.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/gepasusozaxe.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/musekijemerilafaves.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ec651076a---fuzorotuxapasovizajafisok.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/26206805043.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/defumirejapinavujalanaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=rental+agreement+format+in+tamil+nadu+pdf+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_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 16824 bytes
SHA-256: c9daf992b0c75d3f2c2c26fc9165738858c25d431270b878810656b754a8ade7
font_01_sfnt_off000119ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E5 10904 bytes
SHA-256: 07c1ffbbbdeb0c637904e9e9f6b0fe7eddf6623c382db72de052344f9dc58cb0