Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac5690e46fa4286…

MALICIOUS

PDF

97.6 KB Created: 2021-08-02 06:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a498e1e314b11788b84796421f71e54 SHA-1: 677a48728dd5896a3cf8616b304a515896429147 SHA-256: 0ac5690e46fa4286c78e1e795eca9ed9299d853be1cd7259dc944c1d5d054a8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit kits via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/s66jupu6f2n8du2t0nsdo64id0/nememivivoxijopitamabu.pdf In PDF document text
    • https://mimpishio2bet.com/contents//files/sazubesas.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/dolexuf.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/uwesetaladujini.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/61208671724.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/5df13ee83c36add5708afd601f595a3e/69263398686.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/48314835815.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vemivovumeroxe.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160926254c3e5b---26129284.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161030afc2e195---dizapetolivawom.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080c30406ff9---26384256589.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607092f0b7a25---fudogim.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083096d81f47---bemutibijokex.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/871f7553fbbdb8bfb7f7ccf30020d09c/34858045539.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/332e74e6d65921e7924847ed8ceb5720/zevadanipudalukojuz.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/p4ec0kadbtkfippuopc7hg1uic/deruvanopuporajubamoxuku.pdfIn PDF document text
    • http://santeh.md/img/files/xulogivikugudojadipa.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/fe4e3bab612eb397a2150355f08b429b/jidumawu.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/d5676ba67d162d4229f3bbd7140e647a/89859140375.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/tirasezukininakiru.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/34356148054.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/80959016629.pdfIn PDF document text
    • https://kawanmto.info/contents//files/50641377221.pdfIn PDF document text
    • http://wahiclassof69.com/clients/874294/File/tokiwojevapo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa13c08365---85854917273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=que+pena+tu+boda+pelicula+completa+chilena+2010PDF 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_off0001151d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151D 11104 bytes
SHA-256: 45a80f74784276d69c597231f772fbe108786df9892f3f37a1c0b28f1abc1406
font_01_sfnt_off00012ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA4 18364 bytes
SHA-256: 9aa50ba1c166cbbcf2de40e72269c5a810dc5c2d7fbc57a7d998d5755d276dcf
font_02_sfnt_off00015daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1