Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b229297b8ba6c3…

MALICIOUS

PDF

97.9 KB Created: 2021-07-06 21:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d1336c9a68dbac573d7e445a5f6e26a0 SHA-1: e4738c20135d3176396db70e37e581826520be5c SHA-256: 49b229297b8ba6c312c0fc8a5685d62568ff3a69041435b60b68f6922ad854b9
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised WordPress sites and other domains, suggesting it's designed to redirect users to malicious content. The presence of multiple PDF link farm heuristics further supports this, indicating a tactic to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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 http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/lanuzefafimepowenor.pdf In PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/180fdcbdb9c52ca7bc64a499c6b01105/torubetapuwazoxotupe.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/3d6bc47a898deb368bfa662958c5fd09/97267444869.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ujt4treohjiqld4pbnc2j9ep0c/maladopajega.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/pidajafuzoneluzusiwegajon.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/872e6d91d1ac161084e701998c756068/kavufanefolopifuvadaxiwo.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/daxaxudawapavizawatufu.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/58063314428.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078f436f1aaa---96612538528.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160820b69da52a---97128225038.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160beb1fd86284---28948335810.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/vedujepazap.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/dkn8uo0bml7b5e2bsaj79tibkh/gazama.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b0aab3384---gasaxolisujesepavup.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/23654827954.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/jn9k20u9gtbe0149bvv64vlh88/69689094545.pdfIn PDF document text
    • https://bataretak.com/img/files/file/35299555175.pdfIn PDF document text
    • http://e-hane.com/files/sajixabajipuxezitokuxom.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/11441621823.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/44104475698.pdfIn PDF document text
    • http://jucal.es/images/file/66093150110.pdfIn PDF document text
    • http://skupka54.ru/upload/m/26626814104.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/59433121317.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9ec712612df364d099e7e8353294ed75/42494030552.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/9311680653.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c15a842eaf403c1554d610b00cc4fe64/sawafaderexekabadomeg.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093ea18964ca---35660224598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=farewell+letter+to+colleagues+at+workPDF 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_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 18876 bytes
SHA-256: 5e0b3b4b99314740fe7e3f81b0ff1ef475587ebca0c03d1158e241d02f446cc2
font_01_sfnt_off000149a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000161bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161BB 10464 bytes
SHA-256: a1b8db202c5241876b3ea7ae0b3a7c109d67a6ee394da317870aecf7cf859059

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