Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45032746256fcb0…

MALICIOUS

PDF

85.2 KB Created: 2021-07-30 17:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4632e14eae39a16df592afa3456f7948 SHA-1: c0206ff30d1852c64e01cb90d8446cf4ad4a29e1 SHA-256: a45032746256fcb0020f4413d5d50ce857a9f18ec8c2b3f177d41fdc6cb91949
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised CMS upload storage, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afed9db972---75608387789.pdf In PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/8ac2131b59523a0231a128851349e0b4/dunikelezajalupawogenob.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/26175479251.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/25141955633.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6c8f0d80091d56bb85ddd1b0823279e1/tuguwogatagata.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/16ec8077689e17ff312b59789778919e/88077827436.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/78623896611.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0c4bb47a8a32ff8b2dbe03b0998578b4/dosirigajetodonakotupijig.pdfIn PDF document text
    • http://pinetreerealty.ca/clients/55933/File/zidaxewutujome.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078a393e0c9a---wiwijeb.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7c40ead0d0b52027952428b710583e3e/45966942963.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/gbt7q4gfu3lnuek49otkpkgtuk/73993721108.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/nobasugi.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dda15195f0---zojijibi.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/vumuvobena.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/55139827109.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16084019087dfa---tufulisok.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/jifew.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/5743c5b8c385071dceec48fedad54bab/62004426830.pdfIn PDF document text
    • https://maclashoes.it/file/73219234875.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607374dae770d---budebijukopetudukekilekaj.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/88cd424499d16b9f54409c58d0296ee9/96022019261.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb3ce7002c2---bibalufamosinal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=alan+turing+the+enigma+pdf+free+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elemIn 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_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 17236 bytes
SHA-256: 63b56dc68e652fa73074a6e0f639b73f0e29b0fdfcaa23b69566ae9c97c4316e
font_01_sfnt_off00011c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13465 10944 bytes
SHA-256: 2411ea927dc06030b29d601aca17d708ec3e5d085d532677d4254a1f3c548409