Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e2c619a5c5a4de…

MALICIOUS

PDF

83.1 KB Created: 2021-08-01 05:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63bc3a4fa5fd558370c44c641133b2a8 SHA-1: 43c5ca4858c18449cb3673e3732b499294401deb SHA-256: e4e2c619a5c5a4dead3abd68b49133a171d956617dd5bbbd12a55e705155fc34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The primary purpose appears to be SEO manipulation or redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://alrashed-alsaleh.com/userfiles/files/1965843508.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b301962d4---91153663289.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/66a2b6b3f780f0ff53a282d967c2564c/derujusopanowowokipi.pdf
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/92326220147.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/86031698430.pdf
    • http://mdknoodles.co/uploads/files/51768071836.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c26b2d1f9e1---90011944329.pdf
    • http://hrudolf.com/userfiles/85773956868.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b592c48ab26---jamopexulexofovu.pdf
    • http://dongduong.net/Images_upload/files/mumuzibidatatag.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/lnjmena5b3ccsamkg6gi76g3af/felej.pdf
    • http://livelyway.com/ckfinder/userfiles/files/93844848569.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16103c9fe886be---tababobidumuwu.pdf
    • http://kroonzuivel.nl/ckfinder/userfiles/files/supukenedoxijata.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076440800797---15915012224.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/7q6mc5fsl0ve1grm9qat91jnbp/26836082856.pdf
    • https://nadinerogger.ch/userfiles/files/85816613907.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/v55ic5qhqkh1g0trul90uvoud0/butaputeliretilov.pdf
    • http://scuolascifondocortinadolomiti.it/userfiles/files/gugamexowuzemazobu.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae52475aeaa---87267863438.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160764513956a0---xudavibidugemunovevi.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd21a9d560---dakalikabolinagubude.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4435952e4---pubiwedivonim.pdf
    • http://zwickerfoto.hu/_user/file/vesidiligutuzij.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe1f0cb4e0d5a7671a5d2995fa5b9c04/62990622248.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210626033802.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=harman+kardon+avr+7200+specs
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e81a.bin
8294278ab963ac5382b034c72ce7ea0c6ab058cd246746bb201a50f3cdf8a0fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 14408 bytes
font_01_sfnt_off00010c27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 16792 bytes
font_02_sfnt_off0001243e.bin
251ed03813998b72e0d0256e5d9a43ac31892eae814bcee6ebf815a1029cdb49
pdf-font-stream PDF embedded font (sfnt) at offset 0x1243E 10880 bytes