Malicious PDF — malware analysis report

Static analysis result for SHA-256 270e9b544ecf99db…

MALICIOUS

PDF

87.9 KB Created: 2021-09-01 20:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2db8c578c27c3abaa42376d47b908528 SHA-1: 47f6d159137f6ad8c5a68b9279781e5b0c8c264d SHA-256: 270e9b544ecf99db4d7534fa0ec0f188ea6973131af01111170f627b476969cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may contain embedded JavaScript or exploit code to facilitate these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://larrialdiak.es/files/galeria/files/sesowajuzusolala.pdf In PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/b3siqqmp7tmmkevabv4h82a8n9/69125938081.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/78377674900.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/56874d3700cb65d2688c717ca3c74641/rosivakuzixerobo.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/40885448836.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3fa5c0f111fd94808d09c70d6eea6d18/wodaxapuxufeju.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/rojozagikejopawo.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/dikum.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/66aeffff8050eab189f0db8a35172b32/36147505923.pdfIn PDF document text
    • https://aaaxxion.info/images/file/busufiputalujud.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/20936566709.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/59620126060.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/naxujemobolokoliwilugoka.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/69c7ohvbf7m0cbfcn5f26hip72/91680381302.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/karowunejusuze.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-19/20210819083116765264.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d6ef5efa39---kokorotomuvosesawejaja.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160983bb502308---xefofinubidixemobemob.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fb86e32a6---pufikivowezugilofolaneki.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/puwujanidi.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/vugukoxesovulerafu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160949732669e2---11521004809.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/dilezikalokubaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=stm32f373+reference+manualPDF 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_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 17824 bytes
SHA-256: ad85ebd62b11b599b621b59e7ea47b282f38a9dba8fa554c9f35066dfa82b4c8
font_01_sfnt_off000121e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F9 10636 bytes
SHA-256: 06668fa3abeb0837280b487f178d9cb077c2c6a549f27cb0c4bf8efafb6d9d23

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