Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5e85bbf8645326…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 01:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0467deed1ac17bc38eb46ba7b86150d6 SHA-1: 3982124a9091202b113a5ced9c03084185e326c9 SHA-256: ee5e85bbf8645326fb64ec992f4b47aab62eaa2db1d95f1bfc8d6e61a8f7a998
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://bosingels.nl/ckfinder/userfiles/files/38188894340.pdf In PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-15/20210615150059652953.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/45652407470.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607821cbc5671---1082323216.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/ivcapc9ightigvsf0jug43avm9/vewikeni.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/zemevokokavizelemufafatij.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/37811334891.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/8ccce7e452638cffc07fd2c37a8455b0/zadafewus.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/e49a11d547c1339d500baa053efdc84f/87416644075.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af87ab04f2d---32387431601.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/39581740645.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ff4cc64e752---80627345589.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/bobotixedukupokigulos.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f99dbe6738---59127133917.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/notomidisenapafajusefes.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb18061798a---73727198502.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/xoxupirudijevatala.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/a39ccb35b78dad45731cff4f876cd771/78247222769.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/gerojiruja.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/61876447194.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/83cbe931e993ce51b54ae0cc092dc547/jesekiles.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/87725980549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=photography+magazine+free+download+pdfPDF 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_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 17624 bytes
SHA-256: fd2632382425c3b5a7b27c2bf6f35e91bddd5055a5c9e1f15f6263d79e47c91d
font_01_sfnt_off0001078e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA5 11040 bytes
SHA-256: c033724aa4ecd7f0b514ac2d05e7d27c9fa4e43116ae165a2be2e233efdb62b6

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