Malicious PDF — malware analysis report

Static analysis result for SHA-256 394c868cfadab7ca…

MALICIOUS

PDF

74.9 KB Created: 2021-09-07 22:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 02161192308bd871b10b806529ab2394 SHA-1: 4ab845dfff65fe1782523ae2d03a162ee09c4141 SHA-256: 394c868cfadab7ca0e77fed52ca11bc7665c4eeccdc11cee4d32ec73401e7e89
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous URLs pointing to link farms hosted on compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The presence of these link farms indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/korisunitunagitupaniridap.pdf In PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/848f9gfua00dsrpij4qctvpt71/7354021247.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/cf350c27fa506602ffa57b17aeafca74/58390462298.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/gomonofegufobobiwowo.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d198dd7a681---jerelonisozurapopenosumuv.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202108152323182308.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/72234824360.pdfIn PDF document text
    • http://kotolantopeni.cz/file/xabixano.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/e1v7qsbcjqneh9vl7s3uig1qoe/9542699376.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/45996904854.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/dakaxasupafikabisarovimu.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/mubewalezonatuk.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/dhh8nhvtihstv5ou2bd0uronk0/50010401532.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872978aa0b8---ziguvewolekadiz.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/digazi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f68f21e3396---bizevugapupara.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/a007bec9bc9e7908b1c7969f094a270f/4187460222.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/10395717640.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/65262994952.pdfIn PDF document text
    • http://zimmerei-possert.at/tobenogabonetuni.pdfIn PDF document text
    • https://soechi.net/userfiles/file/gunawaxivivugovuni.pdfIn PDF document text
    • https://eclearusa.com/images/file/roraralemokuk.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/75160002572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=libro+de+excipientes+pdfPDF 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_off0000bd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD60 10604 bytes
SHA-256: 18421815eea59ab7d6a11d2aa618cd2faeb2317730e28ce0f581f7f4311fcf7c
font_01_sfnt_off0000d584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD584 19316 bytes
SHA-256: 2c9f9ba691b016725628d33b33f067961a0bbc84e2a9b835b12452ff73225cbf
font_02_sfnt_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1