Malicious PDF — malware analysis report

Static analysis result for SHA-256 467ada969226aab7…

MALICIOUS

PDF

91.4 KB Created: 2021-09-13 10:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11bc2809fdc7fe9ea6f9c08ecc958a9d SHA-1: 8f06e75050696befadc2c3bd43a406d687471f7a SHA-256: 467ada969226aab7c1fdfcad3a7546ff91be4c1b0734698d23658c3669dbefe1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm pointing to compromised WordPress sites and disposable hosting. The embedded JavaScript stream suggests an attempt to redirect the user to malicious URLs, likely for phishing or to download further payloads. The URLs extracted, such as https://inwebjor.ru/uplcv?utm_term=ruler+app+camera+tape+measure, are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://inwebjor.ru/uplcv?utm_term=ruler+app+camera+tape+measure PDF link annotation
    • https://anakmeong.com/contents/files/21942550708.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6209c7e1bca3bf690c7fa48506ecaf82/948277883.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/vitisidaraz.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/dakegikajopi.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/kapadajezu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613414c7d1674---18920212656.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/5749389911.pdfIn PDF document text
    • http://runo34.ru/attachments/file/xafezakinidip.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161300ed158d5a---38474410893.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/nikumimixobasosiluloto.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/53938687656.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613edc0e05516---tibixomuwimewag.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/zitoroja.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/21405549936.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f29c48da93---39586835255.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/35261557894.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/felaf.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/supawaseleguz.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/70640937788.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gomojat.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109110819013974.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/27948798777.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/34886025780.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/funoparuvub.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE638 10364 bytes
SHA-256: f235840ea6e17dff6527bd5294f4dd8e053d19ba4b3effe9516b446e40093f91
font_01_sfnt_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 16916 bytes
SHA-256: a95470c61e93c3431a4b3858b585163611799d398d50b26fabff85af235243c3
font_03_sfnt_off00012df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF8 18324 bytes
SHA-256: 7ab14da06e7b98632f69cd9f53dbcd91eea9e8924dbc3d1e76a345292d244254

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