Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca5767ec3ace2d8…

MALICIOUS

PDF

74.3 KB Created: 2021-08-30 07:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dfaf7ff93c9d5e33e82b8a1d268c166e SHA-1: d4c27d214377d43118e25974fdf8b9f523bb87c4 SHA-256: 5ca5767ec3ace2d8dc8697fd24f00f1ab2d0c114402dfc79cdbcb8179ba7ab59
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/josegesejej.pdf In PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ebf94f7076b5900074c18e3159f8e089/30095773661.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/43772653340.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/kinavax.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/gelubusavubarakeretenu.pdfIn PDF document text
    • http://riph.pl/userfiles/file/xatupabilomo.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/47311703110.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/tupabinatetat.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/zesaxu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763aab8b9eb---gupuzow.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/460ed1669551d3c5564d3a5296434758/22961290071.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/nanijazelolurifapizis.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161095bc437f63---duposaxoj.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-3/20210503111957215708.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a412e032a5e---xuzigagevunuzifefodosuxur.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-21/20210721221812952286.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/53364307958.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/niguregalane.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/felaxomuzoropomimuroxet.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a75417f3c10---bojenejokasujaxunutu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/bk08gkqqnmgl25tick6mk9siho/52428153455.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/fowuteti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=recent+research+in+biotechnologyPDF 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_off0000c05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05D 16232 bytes
SHA-256: 62a21b150329bc0942442479d183e3d0d37c195dcb0ca0f2be1df4a8b3056c6e
font_01_sfnt_off0000ea1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1F 10808 bytes
SHA-256: 52e7643cbf1f246bc571427751d335dfa6de33f51991e76d8e2dff725379c024
font_02_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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