Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d934b6c68a0174e…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 02:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c6a8a9c36046fc40e67fc12884ed22fa SHA-1: 5ae0a69d86524c1752b26d5bdcaa24b650cfd086 SHA-256: 2d934b6c68a0174ed5aa93618025227510f638f600b1be4776bb279235828bbf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://forexinc.ca/upload/editor/file/jagenimewilizik.pdf In PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/lalibofaxep.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7a73e71bdacf36c4ea86a1105bc31e0e/rukakokipijuzudagowuda.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/71989670547.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/vimag.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/27735129849.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/repubavo.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/zuxebu.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/20182006046.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109090409163456.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/26052792468.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210910213234.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/68451612603.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c00a36690942bbf45d7d6e2b2aed55e/paserekovimagibatu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1dac4faac39e2b192dc353423d47b2ce/2458103698.pdfIn PDF document text
    • http://anindecor.pl/files/file/kozuniluvize.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/disuxubizumukuzavoxuvu.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/6224782888.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/zenupusefuzititetaba.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/75506025572.pdfIn PDF document text
    • http://4bx.pl/public/file/10147170254.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321a7c94b04---9623640496.pdfIn PDF document text
    • https://maviet.vn/upload/files/145664610.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/71848304555.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/busixejesawomil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+remove+sms+blockerPDF link annotation
    • 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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB00 10408 bytes
SHA-256: 035a261067b4fbaa52ed06e38d3bc400f7e2a0150b88e74a137f57f9feaf5306
font_02_sfnt_off000112ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 17980 bytes
SHA-256: e82e4848ff1456e5c3617464b4743163a1ae20d27d66b35c5a4dfd3b0d23eba2