Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec02daed0d09989…

MALICIOUS

PDF

101.6 KB Created: 2021-07-13 05:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 09b82a0bf8f989596a895b52e4ba6b1e SHA-1: a7686cf8002fd1b7098808c3aa3f5fa8fe03e01b SHA-256: eec02daed0d0998956106ec7f344580769301606d07db1cb24c8c0bc7de47f72
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics point towards an attempt to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://huntic.ru/uplcv?utm_term=annual+evaluation+template PDF link annotation
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/p7ll901jtgdpuc3chvle8omjab/43060847470.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/50068346504.pdfIn PDF document text
    • http://altinay-law.com/images/file/mazugida.pdfIn PDF document text
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/83185493064.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b35ec88b8---nowopiwa.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/89280400887.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/sofejexixupasomukig.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f50c8b5ecb29ff1006f461c88a56a326/zewodagakexowagezifenafi.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ec993a820---12872990642.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/fisoxofemilateno.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d62acdf6c2bdb22bf3e874fe9a16b953/86216508395.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d917179d4e038d40b15a99d58607893f/37561033335.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/vulofegagidunesisonidev.pdfIn PDF document text
    • https://parfumzone.ro/files/file/polesegabowazofojupaxige.pdfIn PDF document text
    • http://boldogelet.hu/media/87586757603.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e8dc9b090fb---45895797761.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pifadajixipisagel.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a82ef39f3---dinarowufa.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/vasere.pdfIn PDF document text
    • https://tmtteks.com/files/26527590133.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/f85d7aefefd4eccfe8b3a78cb44551bf/43477101096.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f732f4c4ec---mitenubefepofowumare.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/xajudofog.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_off00012e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7D 10292 bytes
SHA-256: aa561c46be3cbbf17f9a4e0b9d613e5fa91ba1d2edb96562bfd4915b65974420
font_01_sfnt_off000145a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A9 16816 bytes
SHA-256: e5f32e96f0d8f08d8c772beb72a5cbf6f9f5151bdc918ed198c1048a4785f108
font_02_sfnt_off00017135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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