Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1cfdeb9bdea490…

MALICIOUS

PDF

71.7 KB Created: 2021-09-02 14:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: da8c4860b21f23b5e17a140eef61c913 SHA-1: 6838653653705aabe0f36280b1aee2f47744e179 SHA-256: 3d1cfdeb9bdea49018459dbeebc154828392dfdd1aa8286cc0905044e56d78bd
164 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 redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

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://garglob.ru/uplcv?utm_term=icdl+modules+4+pdf PDF link annotation
    • http://saharun.org/uploads/ckfinder/userfiles/files/4042403119.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/gezuf.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/setasa.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/662afd5231bdfaf4ebab537d194b840d/mirekejizegedowof.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/28459057537.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/powikawobizozezepusem.pdfIn PDF document text
    • http://trivio.it/userfiles/files/90150286085.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/saxuko.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/fodive.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/37931919683.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/pazovefaka.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d82af9761c---97137157988.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/manemoparisedexutawa.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/26478965631.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/tofuzusaxagumekomekate.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/dedijebisodularazopuv.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/wupulemekulewigejozuvuzel.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/zeralukeninolamajapebu.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/durixor.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/libak.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160acf16e13a57---77060938747.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d936629c5d---2665174429.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865bb0f2786---31167365246.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/dowitenupegozevobewi.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bd3d4d6c0---wivasiwanikaxujujuzifi.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_off0000b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 10356 bytes
SHA-256: 89dc1787d833278e1f493cc12a2f52c82291e1cee55df75744b485c3d48d41ee
font_01_sfnt_off0000d0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C8 15800 bytes
SHA-256: 5d1eade8f77353f98f35cf35932616c9310cfc7f4abf2cfa7a6512615c791fd7
font_02_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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