Malicious PDF — malware analysis report

Static analysis result for SHA-256 78acb196eeffd181…

MALICIOUS

PDF

87.2 KB Created: 2021-08-04 17:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0d32d21c71141299774ca03be8230cb SHA-1: b36a41d3abf27669b120c3aa3aecda58936c1ba3 SHA-256: 78acb196eeffd1817914ab28d2beaff2e33273bbeea31bd8be53b2425e3de055
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to distribute malicious content. The presence of a link to a PDF file hosted on a compromised site indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f16461cc0---kifiv.pdf In PDF document text
    • http://wamer.org/userfiles/file/gewefojevalufo.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ecoeau7d1dha1e57e70mrn6lhd/55543985116.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e506975cc---70579812591.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/cebgsbi6nm32nogi6qo6lguoj9/57764426616.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099be74a0ae9---fuzidenagoxukaz.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa2c422d7e---727131369.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/83417511850.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ipdqg3gbvm5feqo72bfqcese2r/87587713925.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/394697436.pdfIn PDF document text
    • http://davcpundri.com/css/file/17262302525.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4322db543---sanalorer.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/24332922675.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93676776fd---54610415789.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/52719a2ee7a2049a536ec25702f47853/ronixulivosemubat.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/92401523225.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d836b3f69d---5870386950.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e7dfe86f7970c6e8c2847cfe6ab91d4b/jodonosifokusir.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/gokulan.pdfIn PDF document text
    • http://sun-tes.ru/files/file/nozunemiramedesisixegube.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d82111fe---foton.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/97bb2a61d62af4bfd5a6090aaec7f1d7/5507317908.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/84534735282.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/76f69a29ed4edd8f5d6708afb755434a/relanufitazomuvodala.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160862404cba36---magelisumodokavoluxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=descargar+bloody+roar+2+para+android+sin+emuladorPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 17728 bytes
SHA-256: b544afb6cd87d1650952b9548d6ffa1b954740ac40b5b7325d5c1850386f48e4
font_01_sfnt_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 11236 bytes
SHA-256: dd528475ac034eaf3b18a14b365bc7d17da0166fa520eef096601820e8bfa840
font_03_sfnt_off000134e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E1 17136 bytes
SHA-256: 2699b0a69e6dd643cf8002e41cab9dc12bcbac65b4d67f7fe9eae2c0f336b329