Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc349786647af977…

MALICIOUS

PDF

92.9 KB Created: 2021-06-30 08:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 49ff15e6ce6a9fc82bc34c1416a49b1f SHA-1: 8c621ddc70b29b2f6feb32d5796b784fdfea629c SHA-256: fc349786647af977fd3e179449e62e93afe4c50e54b8de429fdbbdb6dac05db6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document flagged by ClamAV and an ML classifier as malicious. The 'SE_CLICKFIX' heuristic indicates social engineering, instructing the user to press Win+R or paste a command, likely to download and execute a secondary payload. Several URLs hosted on compromised websites were extracted, suggesting a link farm used for distributing the malicious PDF or its payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25565666109.pdf In PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/81111f2148f815faffefcf09e769f9d5/90364745633.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/57d89f7aa47c98d8c5d9031be17fbfe1/96501964419.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/gamogalapopiwozut.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/xofeperibijibiruravepasi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087938c36a5e---nolopusi.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717df823c52---jepafobififimewapivuvasa.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a997b625ac1---37579011420.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/97262321538.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/r0fhj1bbui5k0sa4khnnjgmin7/ronitizirapobamose.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/gowigelup.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1cd60585b---88172586255.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/mobovorujatupumijodut.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91936ae7fc---nazovol.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/3flloru7a4k0gajpst0rldslq1/setamolaloxoxajipoweturad.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/hnoeh7hkp8lo8uldfr5msr0a69/jisudexexanebizubezonok.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8a0d568ec02b17f56fb323ce9940fb6b/valajifibudoxabofanokixu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5382ca3fce968dbf263f69b5dc49521d/zapopi.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/79007720893.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ce780179db8---64977757987.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/jemazuwedelunesesaxote.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/98663350298.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b2a755c8a---muwufojufozivit.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/n2lbsuuk16k6l2mm6kobl687g7/58516583580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=shortcut+key+for+delete+in+computerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 10936 bytes
SHA-256: 64fd395f68d671ffb46098a1fe3844aeb5bd1547b01dfde200b21f273028d7ee
font_02_sfnt_off00012f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 20668 bytes
SHA-256: 12f1d00285727c963f3b721792de77e43e4d53ff23669a764c6c747e62a362b7

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