Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b7dcbe514dc7b5…

MALICIOUS

PDF

77.5 KB Created: 2021-09-06 17:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11732a1242bf078d629c0a5d162d392f SHA-1: ac95643574c27a429845f26adb6c417ed54614da SHA-256: 67b7dcbe514dc7b55c212718579a55743a1b5fcb3981008208c6ad55c61e38ff
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous external URIs were found pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and the nature of the URLs strongly suggest it's used as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://garglob.ru/uplcv?utm_term=definition+of+new+product+development+pdf PDF link annotation
    • http://apluskleaning.com/admin/images/file/menujijarali.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/47611493169.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16091a2b15769c---86356321427.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/cd9f6618a3d123cd1a61d3235e7340ee/xopotebesoz.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/lirotogabipenofeloluritom.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/59965988700.pdfIn PDF document text
    • http://kotolantopeni.cz/file/gonafodi.pdfIn PDF document text
    • http://geose.ru/userfiles/file/jumatipibusopejokotes.pdfIn PDF document text
    • http://doer-sh.com/Uploadfiles/files/6263528187.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/fa5a36aa66f2c070f69f8b5c1cf58121/60347776672.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc632a73ad3---vafosefidofejokoxugaf.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/xefazidesikivawuvube.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160911d4782449---50389083873.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e244dd4fd---pusetajerewidasela.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/8324033725.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/75360062283.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/87866396097.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b36ca1c3dd4---35792096055.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/58791564162.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b9fd1afa5---zikusog.pdfIn PDF document text
    • http://caramelitos.sk/files/76725237239.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f804ad3af2---43935119594.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_off0000cb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7B 16952 bytes
SHA-256: d4a9add959ace5424060a0e8cde82c6793d9d8049fca3f40d93c669ece20db16
font_01_sfnt_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 10704 bytes
SHA-256: 5adf90c8dfa789615a8530c29c74a9f8a598d1dd685f6d00cede1f024c7c0a3d

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