Malicious PDF — malware analysis report

Static analysis result for SHA-256 269c9d5392cf9c8c…

MALICIOUS

PDF

73.5 KB Created: 2021-09-05 01:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cb42c7d25e0ba7107e7385bbc2e6b688 SHA-1: bb1f5e059a93d8cc78a1b8c16500871a01961d54 SHA-256: 269c9d5392cf9c8cc4529059a8e4e62d9dca343f9a3d2971f3a021adb5cee521
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16078876f1079b---88245028975.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/e8e87cc962021a6e96ef996fb137d03c/zurotekup.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/ero1vhc3fo67jmm5o4f83m13m4/malejeze.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/bovipoberesezufokoro.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff58eab113---21770985966.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/kimiwewazinef.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/rilevapekebagozekareli.pdfIn PDF document text
    • https://luminex.pl/upload/file/lojigafakifu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608253d0adc56---3594070055.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b009773c4b2---naxadakinesamenugenoxexem.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/zeximumid.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/87660334469.pdfIn PDF document text
    • https://advik.net/userfiles/file/gelogidijunobatefe.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/87226172577.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7a138ca30---4977363225.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/70f2967884d53fb585eae2bc2f363f54/budoxazifavoto.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab00150c0.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/rogupawepebeseru.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e3e4dd585---23654373836.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/28011489075.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939e3d4012e---24989885123.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/befala.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/buwegufutagu.pdfIn PDF document text
    • http://bibikid.ru/upload/88351572448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dust+in+the+wind+ukulele+chords+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_off0000bc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 16628 bytes
SHA-256: dee0f1c746ae6b1d450f8c50c2562f4515e620cadae911f9d996396468b2ca7a
font_02_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 10832 bytes
SHA-256: 2ef6edf0e09d4d186db2fbd9eb9e2d33cb189ae020f83ac3b649b6c45c111dd0