Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc946ecc8362fb7…

MALICIOUS

PDF

75.1 KB Created: 2021-09-06 21:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 58dd969f21c38b348c47d65d84f438de SHA-1: d54ec3f81aa4d7a6c1fb94d790fcf0db41c5588e SHA-256: 6cc946ecc8362fb71b992e7f93c2c41f6c124ca937b6c0bf0eaca4605402f1b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, presenting numerous URLs that likely lead to malicious content or phishing sites, disguised as search results for software cracks. The presence of external URIs and link farm heuristics strongly suggests an intent to redirect users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=nitro+pdf+serial+key+generator PDF link annotation
    • http://biometria.pl/photos_fck/file/getopebufupudowa.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8b60c87a3---xogadaxusuvamezomoz.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/zuwuse.pdfIn PDF document text
    • https://loctra.net/userfiles/file/topureletakebizizula.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b408a889f16---82304028328.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/30682307897.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/03429b0df5e33a5de55ed1f9aeca2714/dedetodeguxo.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/korugosetuxoxisi.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160733e0bda617---vapakuwitatuviwovubatu.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/xatuwipibilejo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819bed81677---2448448739.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da523798724---mafukuwinak.pdfIn PDF document text
    • http://allasclub.com/campannas/file/33944146251.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ufc39ogajp1bft31r32ri5mjdn/motuvubozugebotiropugikef.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/katesuwuroxinab.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf23047d4e---tisarajow.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/xelipebezusures.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/sokamuxovikufunax.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/biwowivezomofesikikaxaza.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777439b338---60991028819.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/39848351832.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/20b8bc2fe401f7b7096475803e29c536/zuzasoseg.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/87662075378.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/sumunep.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/616061b3061c5b2a2ea0df6ca20fcd07/65838560922.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00C 18016 bytes
SHA-256: 7bc05f6ef260e9ee96ab72b61905cede9dda2113b44d34d7054d1a37b90da123
font_01_sfnt_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 10856 bytes
SHA-256: 24036a9043e024d0482d3e0476d7a85817f781f75b12b6c29f1f8b90413b4962
font_02_sfnt_off000106dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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