Malicious PDF — malware analysis report

Static analysis result for SHA-256 4009adaa4724398e…

MALICIOUS

PDF

81.4 KB Created: 2021-08-23 22:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f13cc8bab17f861133cb707dcacead42 SHA-1: c4bf57b44a8a0ddf0e260d1b58973217d84da9b0 SHA-256: 4009adaa4724398eea38b00f151d9d32536e432daa26c584250de2f2618aaa4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to numerous external URLs, some hosted on compromised WordPress sites. The embedded URLs and link farm structure strongly suggest a phishing or scam campaign, aiming to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • 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://irlanc.ru/uplcv?utm_term=integration+formulas+with+examples+pdf PDF link annotation
    • http://bluedevils59.com/clients/862365/File/gokimuloxizo.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/81299218736.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/nufixiwebesuxadololutobel.pdfIn PDF document text
    • http://iltorg.ru/upload/file/20502671048.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecc78875ad---pasorapifarizupapuw.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608551171862c---50753415560.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/4914860524.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/zaxixalaxuxaruwarolaze.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b647591fe22---dupaz.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/36912647083.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083593809ba4---notefunopukabekufiwuziku.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/takobijiridekom.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ivg2qttj1eecds07renv3j46h0/tepugawejajegarex.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/1601456385.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/jevikedidifar.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074c02937dc8---xefafudulekemuxix.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d0293b3e---kabogeli.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0621794a6---74438882510.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/92aeeba469f1e81a1f517d2e067c16ec/82619393645.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/23ba5a0b5c60a80e307186fb5603d0a2/sezukazisugo.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/54272739304.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c30c550ecb---voveniruzawipi.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/98128833574.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_off0000d8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F8 16736 bytes
SHA-256: f35ad02234bc0b873e38fce8c19ebf60182ea5fe9cc065edc7b9c183d3e0854b
font_01_sfnt_off000104b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B2 11184 bytes
SHA-256: 953fb4cbd8bd0370807926e05d1b1b1647cd9013923a692b7358c8bb618f8740
font_02_sfnt_off00011e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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