Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed125d2622ea068…

MALICIOUS

PDF

86.8 KB Created: 2021-07-27 23:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 673649d8860d7994e073d1f87e3fe2c5 SHA-1: d695200d1a65dfee2f4278831730411f4834baa9 SHA-256: 2ed125d2622ea0689d4c76c6def7463ed4876d92019110dc0dd1ab6526e26d42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable hosting sites, identified as a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://carzip.biz/files/uploads/files/96799715788.pdf In PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160761c92c8b2f---bezaximofidajifab.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160703118b414d---70420188829.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/96769725544.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6jco1gi98gf8sbjmq2fp0gfrj4/pizolapefipitosemo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096eccb611c8---85692767101.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/0e0idl3mdgjc38rtu0ts6vd666/vimudol.pdfIn PDF document text
    • http://whatdwellswithin.com/file/62810251742.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/tsdmjon893ut7m0odo5l70u5h6/74845661932.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/gepezebifudumamode.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/8dd529dcdd1b616f7331a0781dfc3823/giruz.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/dijolafasilevopax.pdfIn PDF document text
    • http://allasclub.com/campannas/file/jitorijunojeluzebu.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/10355544436.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ba10377d539---zuxagiwukinu.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/wexinevonasoburuzedabular.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/97980288225.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607262fa869bd---30346703329.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/94216992814.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/naxiviribapiladukaro.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f172a1800d---fadunebo.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a2d8b2033---27100790213.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160948e31e59ea---2613109111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+critical+incident+response%2Fspecial+police+operationsPDF 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_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 17072 bytes
SHA-256: 3f3ea6b63764d1a51d0b25eb383da5231d85a4c3dcbbed529fd9e2b6b6cf7e1b
font_01_sfnt_off00011a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 10636 bytes
SHA-256: a9737d04a939c504854ae4cce5fa0ffe80a652c22b075b2f700c475dd63f45a4
font_02_sfnt_off000132d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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