Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e0d2d7ac9f5edc…

MALICIOUS

PDF

70.8 KB Created: 2021-09-02 01:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 715038dcd5826fcf95aa98bf171f5e44 SHA-1: ca7081fdb0be0d31f4370bc86f0c1a651a6726ab SHA-256: d0e0d2d7ac9f5edc8524b6981c45c967949e9bbaf5e88b8d14d2b25baa9331e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on compromised WordPress sites. These links appear to be part of a link farm designed to redirect users to malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=fire+red+roms PDF link annotation
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a404bb501a9---fumarovujavekopeberujo.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/fkv7gdghiuq0rs01kflau84062/golebezo.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/76469a36df9e7599f700677f42f8f4cd/gukaniboj.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/xevowoveraromaf.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/kuxetebaveneso.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa95f400340---85054018414.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/qet2dajibvahhvrtj5kco12njn/37159583789.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/52742860563.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/22695208530.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/7094116071.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/22508068663.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/sajivasixuz.pdfIn PDF document text
    • http://artediapharma.com/upload/files/vagozakukogux.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/jixexovozerobevibevupilo.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/818163136.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e6ea900fc---xivunobetufufogeme.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/db7jl295paag38hk1rrv7sd586/moxepukamiwevigixasawasif.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/adfe5b95c55521425ac8822f03ea5bab/pofelewadubozeluv.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/rufegula.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/75387158154.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1625835845.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/zifexibafedekowo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161298d1e0280a---77086940145.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/fimofelivikodagivaxanefa.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In 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_off0000b6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC9 9976 bytes
SHA-256: 0b1261e74d5d8cd632f538aff6000d5f8ea80b712761e93b3f6af31adc106749
font_02_sfnt_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 16216 bytes
SHA-256: 4f58075dfef12fd6a86d2905d9dac40b9df64850e7825ccb2253e9cb6508a5c5