Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfc84c47f044248…

MALICIOUS

PDF

94.0 KB Created: 2021-07-03 12:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9215fd00d11772e7b53967e24bbbec87 SHA-1: 64998fb851cdd2f64ad3b5e008c20672c989994d SHA-256: 7dfc84c47f04424893a9dfbbffcc90ed818568dd4d344ca45ba09c65c6a28f61
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites, indicating a phishing or redirection attempt. The presence of these links suggests the PDF is intended to lead users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a24011b445---kurozenovafunogiloviver.pdf
    • http://abwgulfport.com/uploads/files/45134561473.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/21b445967f2fe5ca0d86313af65d0f0e/fiber.pdf
    • https://mamap.in/ci/userfiles/files/gejuranut.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b15294869eb---37695188108.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/208e18668ad9a212476022fba74e5c75/25389151676.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/0b19401768dfe6ad26906c503e7cbd77/62115669902.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3d5e236db15c114df8e78256cf75db14/22011522136.pdf
    • https://codecs.ro/images/file/lipulibigada.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf4fbb1a9a---47347676463.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8816301c0a---301339434.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/90740dfe06480559f353e7e5e1e8473a/nuxorimekonifi.pdf
    • http://mamam.by/upload/File/file/47895393483.pdf
    • http://gptools.net/userfiles/file/92704530196.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088aaff9df16---69979428685.pdf
    • https://flardochform.se/userfiles/file/20412847523.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/pvdlc6r9ehsft7pk9mosjqfr1h/79693930484.pdf
    • http://thrifty-uy.com/files/others/21119976700.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077e67cdfa92---63969479639.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbccb47d8af---tarotuferokajinos.pdf
    • http://cerrutistudio.eu/userfiles/files/pobutapagewiwo.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/72937018711.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/80407651389.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b8532a6ac02---vulijopifumedetilurujiwup.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/ce4cda51b9c674c70b4b5a05dd2a4681/zinom.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=meaning+of+the+word+detriment
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dc9.bin
02419c464bf3a34c4dce2dbd684d475bf9f85eb6786cbad832105b45a81b4803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC9 17168 bytes
font_01_sfnt_off00013a90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A90 16792 bytes
font_02_sfnt_off000152a7.bin
ad87ca7ed2413406ac599b91fab21309443af43d4d5144516b5fb168e1929ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152A7 10668 bytes

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