Malicious PDF — malware analysis report

Static analysis result for SHA-256 760e906d8395559d…

MALICIOUS

PDF

79.1 KB Created: 2021-09-15 20:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ad4c2e4558865ba40aa160f434c0a0c SHA-1: c2bd95e0dbcc5a38dc00562775e3537a0a2e06e5 SHA-256: 760e906d8395559d8df18febea9e37bb35a7e199a65fdb28144a2ffd9f542a37
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://hanyauntuktesting.com/contents/files/nizagivuxabitabixugu.pdf In PDF document text
    • https://sindonis.com/userfiles/file/xiranijejodozekegida.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d97jqj0t3fefa2kfrf37ols045/bajavup.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/pevabazabeboruvubumak.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/jirotufekizinakikevezavu.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/xemonobafisawifu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161358b6003281---78526597926.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/widuletutitemotefesu.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/23931556431.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210906132003.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/fizipabimufenazeb.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/siximegikula.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/pimufupu.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343378da823---47047579160.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161419daee534c---43993123900.pdfIn PDF document text
    • http://net-marketing.hu/images/files/leriwutojawig.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/kajifawulekojugenib.pdfIn PDF document text
    • http://art-ball.net/files/file/bazamumeba.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cab5c3f60c---35100345709.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/71853270377.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/zejawabaximomojalu.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/goluforovujebukawivu.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/28830026675.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2e103b8c305ebf3c283b6b4a8c9f55ce/zuxitosevunojob.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-2/20210902093128496131.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/36055798913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=candy+crush+apk+download+hackPDF 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_off0000d09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09D 10712 bytes
SHA-256: 58a16a587c71b261ea13f66b289cd3c21d556717a2008b71ee09d9d58b8d8316
font_01_sfnt_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 17752 bytes
SHA-256: 855189254e3095fc101a6773ed7c4234f28696979c77ffc96e064cb7d1256c18
font_02_sfnt_off000116f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1