Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b93b71b46ae399a…

MALICIOUS

PDF

86.1 KB Created: 2021-07-08 15:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a5c5fc7872ab1954a518da24c014be2 SHA-1: bab4abbaa0777135b8c33f4e0affff564f1e307b SHA-256: 2b93b71b46ae399acf588a56c7e74100f6b0c4c852758d79c23e6ebb82a14f30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains. The presence of these links suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL distribution point to a phishing or link-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=plankton+definition+for+kids PDF link annotation
    • http://etcad.net/np/upfile/file/kakaporedavugalinefetula.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6f6b25c7a6427eaa3545f24366238cdd/bisubozinaronaxer.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6ee861a7---70786894896.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f53284b0dc---jepowomebuxifedowavelop.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01a677b9af---puwagefudema.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2f378e768---80672895040.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/jojufep.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/8004805818.pdfIn PDF document text
    • http://beiks.info/public/file/33557543893.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/514cd60bcfcfae8fc0136efdd17a344f/kitasuwuzenidekeditegoden.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/xaleluwemomugowajet.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160e287f47eaca---70118015667.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6f438e5bc---6590789064.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090abc62d584---65749709406.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3282d0798---gozafutoxu.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/tolibopi.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/4103785989.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/12aivivfqllmk8btmotfftumin/68933455406.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e500b9f6165381ffaac9c1106786ec94/pizivatonire.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/gapirudaniponepawul.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/xukikunumorefagula.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0724025bca---woxexakaj.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/0f900bfedf8e7bf26f020da01152a03f/10877323371.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a3103065c---bamekoxeneka.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_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 17512 bytes
SHA-256: f6438d6062069f0e2edc18ead8c8c9055905429f6530b773d6076125046efc0c
font_02_sfnt_off00013369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13369 10440 bytes
SHA-256: ee8e5ef80ccfe35a510744ad29eaa640ff9853822015e867fdd31625cb47dff5