Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc019ba6db0f36c…

MALICIOUS

PDF

84.4 KB Created: 2021-07-06 12:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f55ee45d205dcc578cf56133e0f8778e SHA-1: 2b8eece6cdcf8bf3efa89d9352c98c807a34ba49 SHA-256: dcc019ba6db0f36cd2c3e70bc4aeb01e7ea4d6c453a2e3c9933f071485addb91
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are associated with compromised CMS uploads. The primary purpose appears to be directing users to external sites, potentially for phishing attacks or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=cycling+and+weight+training+program PDF link annotation
    • https://bomberosdenavarra.com/userfiles_nexo/files/kanovatekob.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/ximag.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/sadaz.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/2bqpn4irokprr1q1qi57ivjvk6/65749743628.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/56489536881.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0e49d9e1e---21572154322.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/mutalumavemobakitolutime.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/37392159635.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/63930247019.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/semebapalorefujagolum.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16089993b9c49b---90338416814.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082499e342d4---19709674046.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/20314794239.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a002594d438c889fccda6a3bbab6f1fb/nidusafun.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/26a5a34508e02f612082ca9211485e3f/36075824591.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/69012129790.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/13980d41a1c4b6fdba7dd203dc34a7e5/43781308617.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/23883612013.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/90954272824.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/38211476608.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/wunagozixakaxewojavil.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e5a3021b6---pivom.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_off0000e46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46E 17356 bytes
SHA-256: 9d9170aced9984d18b782020ad615875e98669a60328f5c5d6c3828bc0b9c973
font_01_sfnt_off00011159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11159 11024 bytes
SHA-256: 3690f96f758435634ab043c461fdc9937cec159a9b4e2c8fa8c8cdba71d63eff
font_02_sfnt_off00012aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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