Malicious PDF — malware analysis report

Static analysis result for SHA-256 e583f2c8002f24d5…

MALICIOUS

PDF

85.1 KB Created: 2021-09-20 01:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e092faf873041281e5742d09956472ef SHA-1: f4f36af2a24c749f9b8ea7447de469dda6943d2a SHA-256: e583f2c8002f24d5ad3837b0722ddbe446552618f704505d82ee666ea9433e3d
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 disposable hosting or compromised CMS uploads, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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/59742711522.pdf In PDF document text
    • https://penal-garazh.ru/files/temin.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/lifujitarodop.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/ximuzawojadebud.pdfIn PDF document text
    • http://bankerz.in/qpic/files/21583683288.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/vexaw.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/4785816756.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/gawazat.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/b6f433d03ff0508e8d218f3dfb99cf06/masedu.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/xoxututijixewiwuk.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/cd450f72a7ff82728d37d65c05d174b6/25586962336.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/lusasakomilinizubed.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///suvefo.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/bc9595bb06935f8f32739fc19d93e1a8/dezivi.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/42652357685.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210901_071814.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/vowegirujebabojik.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/retevasateru.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/3278522940.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3a4fa08c8---bibukafisedajenodusupi.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/fiwuvija.pdfIn PDF document text
    • https://ms1oke.com/contents/files/xukedirosidufuxamovuj.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/fidabim.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/fotojafajodanupokegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=smallest+android+phone+2016PDF 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_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 11196 bytes
SHA-256: b3ecd13abb17282abf30890595e7e733ad27698f6696704201de64a5fd8c4451
font_01_sfnt_off00010053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 17952 bytes
SHA-256: a6b07fa35213279fb5033490cdbcffb30011133f5173b799707d9101fccd0a24

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