Malicious PDF — malware analysis report

Static analysis result for SHA-256 7966a7c8512026f0…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 15:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a469d20007c0c5931ce7d572045902a4 SHA-1: 488ce6718dc4b7be7fdd91d6a96c8bd00f68f95f SHA-256: 7966a7c8512026f08b7f6a8c2f95a1322d52ae165e60938d9a4f11c35d96d13a
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery vehicle. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the PDF structure and heuristics strongly indicate exploitation or redirection to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sibinetweek.ru/userfiles/file/zukij.pdf In PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a30cac0d630f41b95169ba5e3d4c309b/pejuvinewuxiwok.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/61606827484.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/2301f01b1d1410b84346ed84bc2ecae6/42142104588.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/legokalox.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/75559695559.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc45f2b840663da046570f0e6af59026/pekego.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b126363a0c4596daffcb592e8cdcffb3/mawejiwosin.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210601151532.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/rifugeremas.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/58425118533.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/53514819126.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d5e478c62---77846696383.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3e4d5288a0d2db4394754c86e9a548d1/98376216001.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/90218206757.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/jusibalavux.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/sanos.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/gupurimixabi.pdfIn PDF document text
    • http://roocenter.ru/upload/file/zunixusuwirulimukabazo.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210624_091402.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607770658b80a---xinotulifosopori.pdfIn PDF document text
    • http://hondaotohaiphong.vn/upload/files/sifizorapujuwigugonipan.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efc36658a7---dasepig.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/samumikotuvufuzukivuxelam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=where+is+trash+on+my+androidPDF 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_off0000f114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF114 10572 bytes
SHA-256: 1eefe797c85eb29bf9d218259ee23e88bbdd3f06db8d43db8e78fe40d77f3dea
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 16896 bytes
SHA-256: a3ff7b92a59bc72a292f834a40ba518be68bf3e7f28402507cbd614ab6cec595
font_02_sfnt_off0001353a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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