Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0212222b351c6d…

MALICIOUS

PDF

85.8 KB Created: 2021-09-11 00:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b1c91c3745bcaa50b04f876f7fa0b931 SHA-1: f2b23f5f12e80e1967ba9fe0e9558e0e18c7a68f SHA-256: cc0212222b351c6daf6f5be1c928f9448bc794f66ec7790665218959348ca492
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or scam lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://0924055971.com/uploads/files/202109031302171895.pdf In PDF document text
    • http://hotelclinton.it/userfiles/files/40867223489.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/vetisebemaweg.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/37009872121.pdfIn PDF document text
    • http://ned.ru/uploads/files/72604289274.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/kifexolakejosuxusexareta.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/zajipalupuf.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133ed58ce320---nakufubukenav.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/vasozixivojawuxulewofuki.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/42170975394.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a9db958a8508e4ab1359eed5b6b5622f/xumisetavubaxubukewirof.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/46842982332.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/pufiwofurijezeja.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/43455135626.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/galuzegewemotusiwus.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/kukokedosopigotanobori.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/jaxuvejopalokirug.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/67531096725.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/027bbheq0bh3h2mnhd72fvleu7/sivowadematiposebidifigib.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/13271287428.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/a1ba6155daaa7348f471f75aa54783e2/12051441019.pdfIn PDF document text
    • https://shevian.com/images/file/76255045075.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7b3a81660---21406165428.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/towarimulivujenakurusimu.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/koratakapojuguvej.pdfIn PDF document text
    • http://web5gstore.com/Files/files/midufopagabel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rbx+robux+generatorPDF 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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 10364 bytes
SHA-256: 0dc3662bc773aaab7718370bc8ec2c9b80b01444dfb7c5d0eeb2124829d90172
font_02_sfnt_off00011c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7F 17396 bytes
SHA-256: 23e2586cc13bbc3beaf7cc726aa2cb963385592b9d254c001e9b1b4ada2820bf

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