Malicious PDF — malware analysis report

Static analysis result for SHA-256 5217c10d4a3c4f82…

MALICIOUS

PDF

87.4 KB Created: 2021-09-12 20:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d15ed166e5a784c541d420d548eb4dcc SHA-1: a5dc7ec2b94f4f80c6aa55433d6318c5ac0e5d3f SHA-256: 5217c10d4a3c4f824496a364747600862538f1f38459a67af9695256a73f8e48
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=how+much+time+it+takes+to+learn+android+development PDF link annotation
    • https://puntodeplacer.com/userfiles/file/zolopokafarufakerifa.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/10702160231.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/23342236733.pdfIn PDF document text
    • http://mobilenmr.com/files/files/fonaviwepivakedomugig.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/diluwagipowofuvamufovi.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f939ccfa0c7edd6d80109d35c5462980/fulilutu.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/mabowodawumafi.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/31371247822.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/21121923677.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161340c557d4a5---3840013999.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/mobabexaw.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135ece0e69c8---84479597157.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/3541413998.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/40334323061.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/xajebozebo.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/piver.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/13242814822.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/75636011116.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/vifulareromenebedosu.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/19307089425.pdfIn PDF document text
    • http://technocom.pl/editor/file/55439112931.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/jeleliribifabes.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/popemo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee34d2c2c6---rewiwexili.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7494038d05039d83e79efdbc575aec88/72001919133.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 18180 bytes
SHA-256: d4a872f5f99dd5cb0a92333e9c609e72cb566526cb8c5d14cc9d5ed5247d706f
font_01_sfnt_off00011df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF1 11112 bytes
SHA-256: a6926fe3f5531871c955502dc0d4691106b56a9df64e1af07af735bc5fdd90f4
font_02_sfnt_off000137b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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