Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c0da903dd49e4d…

MALICIOUS

PDF

92.2 KB Created: 2021-07-30 09:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b9025f6579dc108dc58939efa3f3d394 SHA-1: d312ffb183351bebd4275506087c87f229f1295a SHA-256: d5c0da903dd49e4d507b622f0d50ce58d38f2c710af0c14810cbb2564ddc0df7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The presence of multiple external URIs and a link farm heuristic indicates a pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/72ic0i708gb75lkqd9bgdcvlt4/desixusezirida.pdf In PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/43708509364.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/vo3hg9q7vsu134av9r6ot8mssj/98474259536.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d264df7177c---42289508498.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d88f2e8558d---lajukus.pdfIn PDF document text
    • http://jp-cable.com/d/files/13827167164.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/33e80b8dc1d5f648aa48b50261e26782/48112520728.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/refalifo.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3be44b827e---28509965894.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/12083062502.pdfIn PDF document text
    • https://unosms.us/userfiles/file/93223493425.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/62483814373.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1212f3044---28550842995.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf659bf93---74392463246.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e9cf852c1---59880087191.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/mavixufovafodomiwa.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/vezorudegal.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4fecdf055---jidekos.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/0hetbsblgu450h997del1h5bv3/bumazetujozozidak.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/kusaninagopoja.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/40346636752.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b7308d3cfdd240d351a9066c14b25f41/kexite.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/98008225193.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cc7441d98d4fa8ddd516be375cef2e6b/rozenoduwinejiseme.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/cc2258b5866d47377661adf7d4e6bc26/29824519395.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/rd64iubrv3k8j1ol1dmshtfd33/94003175744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+use+a+motorola+talkabout+walkie+talkiePDF 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_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 16588 bytes
SHA-256: 214a0dd689875d2af403fabb592ca2f41eada94aea712c2fe7458e6c847e13fa
font_01_sfnt_off00013189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 10576 bytes
SHA-256: 58e313abce478dcb6167531daaa30049120d85dc62dab6047ab8e53ff220f1d1
font_02_sfnt_off000149bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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