Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab6bd0417e7b6d1…

MALICIOUS

PDF

78.4 KB Created: 2021-09-23 00:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d2a72dffdd1522348ca97854a94dd1bf SHA-1: 6756b5206e6d6606d91381a97b01c96c200cdcd3 SHA-256: 2ab6bd0417e7b6d106ed4b1b8d02b671c7ac9a192bbb797876ff459100a3bd79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to potentially compromised websites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing attacks. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://evergladesharvesting.com/ckfinder/userfiles/files/benelebovewuw.pdf In PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/desixamawapowogikox.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/77846999451.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/80892677355.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/potizope.pdfIn PDF document text
    • https://unaizahic.com/Files/files/sekoluvinufoja.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/vupov.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/ditufubokexubofavu.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/miponakiwisuzenajiga.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/bubivuxefokulozupizumewoj.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/gamukexorafatudululefed.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614773a48ae3d---vixolavi.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b36ef10f25---busojexeserol.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614834b66aeac---2880295303.pdfIn PDF document text
    • http://poorclarescork.ie/images/35978158407.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/unsdqgd60u9bg0a10tqpht6o5m/pugopulidonelatob.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/87450232209.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136e79b9f68a---tedovilabisewu.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/59598738545.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/lulezolefegera.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161481640be51b---sadaviwelaluguzupabizu.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/gatef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=vivavideo+download+appPDF 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_off0000d1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 17152 bytes
SHA-256: a2874ad7472adf758a3bde4041eb961d5ba4e14ebad3a86039accc398f8dbb25
font_02_sfnt_off000115ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EC 10140 bytes
SHA-256: a25c558a2fa5d0faf3c1632ec7eb20e23899ae8fea8fd4555108105b8eed8e46

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