Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceceef64c73b556f…

MALICIOUS

PDF

86.9 KB Created: 2021-08-07 02:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 19ac9c0d09ae180dea1848c1a11062fd SHA-1: f8a8fbd6d2a6291a3d6e31faa42e66f573a230d7 SHA-256: ceceef64c73b556fdc3c3e2170d6bafd9a99455895f3af612131dcca978760d8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many pointing to compromised CMS uploads, indicating a malicious intent to redirect users to potentially harmful content. The ClamAV detection and ML classifier strongly support this assessment. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities to achieve its malicious goals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • 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://wastran.ru/uplcv?utm_term=tourist+bus+simulator+full+version+free+download PDF link annotation
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886eaf5876f---46479281038.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c32929cf0cf95cae3aa5e7acc12f9745/webixokamijibibuto.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608002be6d00c---3495032664.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/64312852247.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a9dfcaef587bc2716deed52228de4e65/lodos.pdfIn PDF document text
    • https://norservis.cz/files/files/75551289492.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b63295b806---82264003637.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/c6m5hpl7boc6f7g7o68scn1tre/1705618376.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/c84da538bab6153bd769d447f9002c0d/ronodujejeleleramesonel.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/36577792760dc8f1a41c7b.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/gih2at5jhpc0ari48kd1einjbe/bedab.pdfIn PDF document text
    • https://petek.biz/resimler/files/zuxep.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1d2cd68f271644671fc7798d6b9b5d16/tefokonunew.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/69283975416.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/43410602807.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160861aa79558e---bavonufojuzoselinoj.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/17865432973.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/lunob.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/46515987616.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bb0acfac7---xareturoserawavifobelijer.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/lazalolagariso.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a779e245c---sifevibadimaxavulegojena.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/50c4fd48ffaf82e0f65b25a65db3e4b5/16460953700.pdfIn PDF document text
    • http://babamoleskine.com/files/file/wozazugafajujonoweraro.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d52e02353---30175821457.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e35c5a0c19d5419d99c86b9d9be5c2cf/keradopusedaximato.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_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 16420 bytes
SHA-256: 4a88502de8ea52ea6a9cc3dc0ec2b33a33ec9c8303ae54a79c965efdafc834a5
font_01_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13482 10868 bytes
SHA-256: cd28826618ac1bf090a5977e4858aa17cfc1241cb21f8e60e2aff062d2ada34c

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