Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cc20dd15a307dd…

MALICIOUS

PDF

85.7 KB Created: 2021-09-16 16:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1d61a10b20ac64492c55f1a1304a1957 SHA-1: 760fb187e3b54ae6a2b0fa2552ca5e7cc5c6ea35 SHA-256: c6cc20dd15a307ddf1828f5c323b55821e696c6f3390d6f0c2ec657d0b483e21
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure victims to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/1c0354cb925189461adaa5167b06a74b/30616647115.pdf In PDF document text
    • https://rizecanreklam.com/images/file/rivuzaxotupiluposetexa.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/xuzivivufegepefofoxenatig.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/3308003449.pdfIn PDF document text
    • http://lamay.de/userfiles/file/wipaweremejumunobeno.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/45497505302.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/11/16185874166.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/49410550314.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/45185648797.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5c51257c0---42077497315.pdfIn PDF document text
    • http://www.tecnobor.es/ckfinder/userfiles/files/46462851729.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/vopuvopewekepovu.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/59480841743.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/f4b8bb6621d446f786bd3330d5c3baea/xonurebev.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/43969535014.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161404d727584a---78025658405.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/guviritupevo.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/dojexebuvekasukafefub.pdfIn PDF document text
    • http://goldmustang.ru/files/files/xosoneja.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/452296926.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/179824122a36e4cba258802816441aeb/xakonoroxoxawuf.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22e896ae2c75e3b6454f40882cf3a252/47362133043.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/29810422910.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=android+edit+app+iconPDF 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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 17180 bytes
SHA-256: 1aefe85914368a220b2d1d14f157011ae82f8ac050fa7e578cd0bfced30f0d15
font_01_sfnt_off00011985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11985 10272 bytes
SHA-256: 8ccae18dccb6a320a79a124f1686bd71267fbed6f21f6efcd8f223cad263ffa9
font_02_sfnt_off000130be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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