Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03c69bd50fd3c37…

MALICIOUS

PDF

75.1 KB Created: 2021-09-03 18:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c75051a785a5ad6b51940cef17b1b2b SHA-1: 5183d6f6db04314b5493d28246b0e529d7053d3c SHA-256: c03c69bd50fd3c37d12f2e6390c545d48274535c165de806f708ba7a82305705
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised or disposable domains. This is indicative of a phishing or malware distribution scheme, as suggested by the ClamAV detection of 'Pdf.Phishing.Trojan'. The embedded URLs are likely used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

Heuristics 5

  • 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.
  • 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 http://xn--aknmedical-yub.com/uploads/file/94968354143.pdf In PDF document text
    • https://ratsimae.eemedia/contents/file/37269333158.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/65522868068.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc2fef56c---33333179135.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/15e34a4f3b09b3608702be71e75cb02a/somak.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a99ee3253---wabaneridesibexosedaz.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/wokikoribiladogiparo.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/99520173399.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/44207245380.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/jefamepetenevugisiwen.pdfIn PDF document text
    • http://yjccnc.com/upload/files/98106340222.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/lozukasowopojonaxezopoxa.pdfIn PDF document text
    • http://parisplaza.net/clients/3/35/3561a7ce45da2f2f114a98ea6175a4b1/File/dasuzon.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/naligufijinapimo.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0c08d99b8---bakikudoxavarezaku.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae74932e1f---giribazutebalovilemilowe.pdfIn PDF document text
    • https://latework.cz/soubory/24445755116.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fe6cc2ce6---tazitulorilozewisajus.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/pometuwaputizajepip.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/2304708788.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/kukutanumad.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/e1414fe5avac9mi88nveusnsio/faduja.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/litorubevizog.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/51312490573.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/todome.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610d74da43975---gefosijumekefamiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=diagnostico+educativo+definicion+pdfPDF link annotation
    • 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_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 10816 bytes
SHA-256: 288c4b5cb4ab99a94078f50f98039ba64cfe44b1568d2d70362f475b82aa28cf
font_01_sfnt_off0001127f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1