Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9a60e170e0966e…

MALICIOUS

PDF

91.2 KB Created: 2021-08-24 11:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 06f2c517e3085f51e28bd1020128bb93 SHA-1: 845636a746eab985dbf5aa531700284deba916b7 SHA-256: fa9a60e170e0966e7fcafa581f772878c9eb62c404ee9ae456ea7ffde0c2b120
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and potentially malicious PDFs. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to exploit users through deceptive content, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bamfieldrental.com/userfiles/file/lilanozedolaxot.pdf In PDF document text
    • https://ewastexperts.com/userfiles/files/61258306987.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/xevosunowojegafus.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/3fba5f3c7dc489b6a6fb7638f3ec3242/fokelimo.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611580933e7cd---24996982551.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/tuvowudu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/68b092597309591bbc569938eed9b490/dukixuxagige.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/7953078052.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/ladupekeguneko.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/ranirevebezedipitar.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/7774045345.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/revurasifulitumuxudafejuk.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091426db952b---91911983661.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/roxemuburomovasajete.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/61561872002.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/24608069525.pdfIn PDF document text
    • https://actorconseil.com/files/file/nusetuwatugovasojupoki.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/59601417874.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/nevigopejol.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/detijulazotupujefuda.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/sivugofinezirawesefejifi.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b68b9e5652---79833789494.pdfIn PDF document text
    • http://alves.bg/ckfinder/userfiles/files/dovafamuwinunozijofulanut.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0jv12s4g2cvkls9fbhp2uibfg3/38065800278.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fb04985ff---dusiverigapirideta.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fabae3a9b1---tobegusojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=old+book+selling+store+near+mePDF 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_off000100e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E9 10848 bytes
SHA-256: 8a6f9ca42cc276064bbf9079447eacce3d77aaeb00f11437d3cbd12facca54a8
font_01_sfnt_off000119b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B1 17404 bytes
SHA-256: 932e8b097d3b3ed2eaf21b10d554794ae0a105bb0d13eab3d9a4a116d8c24341
font_02_sfnt_off00014699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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