Malicious PDF — malware analysis report

Static analysis result for SHA-256 756b16e62f006d88…

MALICIOUS

PDF

77.5 KB Created: 2021-09-17 09:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7abd7fd401f5c32ddccd920beaad06f7 SHA-1: dea93d04668f5edcf059163ca9f47df440b431be SHA-256: 756b16e62f006d88fdfcc3e94fe82484ead3a1cf940418fbc945d2aa07a782b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which are associated with link farms and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pharmabiosolutions.com/filespath/files/20210917093740.pdf In PDF document text
    • http://didula.com/img/file/93587606302.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137073017b4d---wavelubikinal.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/40616836229.pdfIn PDF document text
    • http://makaroma.fr/upload/file/xuzobejoxewopokisufovo.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/86541417449.pdfIn PDF document text
    • http://flomojapan.com/upload/files/lavifexeki.pdfIn PDF document text
    • https://tempegaring.com/contents/files/11989235505.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/35789135632.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/tinebig.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/gozawosute.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/bl12l82hs0m5qiibu8l55tonr6/nonelimegizaj.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/47389630969.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/muvabevabix.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/mamejanefomum.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/mugitizitilewefuluviforig.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/murimamip.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/26085517033.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/goriwitugepiborotekajofo.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/vupexawaleramovetodozo.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/28457018985.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/jobosiw.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/90225666084.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/powudejojifu.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/90235955741.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/filapozizozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=android+11+wireless+debugging+qr+codePDF 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_off0000c7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 17924 bytes
SHA-256: 917c80a54a61fdcaeabeeeaab719a60d604c36146a0776479fc45da361a4ebf5
font_02_sfnt_off00010e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E49 10792 bytes
SHA-256: 82a5f563f7692c3a941477371ca2e550423f2a0769c426a6110267685b60c264