Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9e5a40295d6073…

MALICIOUS

PDF

74.8 KB Created: 2021-09-22 09:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 0d97338e915cca3a0ab59169e231e7f5 SHA-1: 82902375702dbc86b9f427b32c2ac44071dba9ed SHA-256: 8d9e5a40295d6073089622dd929514707fc536342bc0b406164d93cb6822c32d
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://archism.ru/uplcv?utm_term=android+mein+sabse+sasta+phone PDF link annotation
    • https://intersensor.ro/v2011/Files/fck_upload/file/pipatolijoruxisewi.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/kotarobokowutorelaromoda.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/8656520018.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/nutevejejupu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/1c19fc3203c6975600eddca4f30f1893/wonama.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/falanejubigopozir.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/42163600914.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1fe77c2709e4ab6deeebdbbaec4726b7/46834020440.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/bilefazabipegawanimanarin.pdfIn PDF document text
    • http://skene.es/userfiles/file/manizuxumozow.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/59748605503.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/859d470607fcabf9e85c6fcc13326399/vezasirudijexemofe.pdfIn PDF document text
    • http://zerosquareonline.com/file/pakerubugivovebop.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135020e3e0f7---62597918552.pdfIn PDF document text
    • http://toonesk.com/upload/39478941689.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161467333d11fb---pedazivunu.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ee5080faf747349143cb0b1ab4c07b02/dutuvowumoredeze.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/65642375983.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/27085780980.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/2153972861449f3de1228.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/vewilakeboretekapekezasof.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/befasoxaroso.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b05a77564f---76559066478.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 19520 bytes
SHA-256: 22b49bfbc898107ebd51ead18c4e0659adbb2dde4c7e54d5219c923d9d7837d0

Open this report in the interactive analyzer, or submit your own file for analysis.