Malicious PDF — malware analysis report

Static analysis result for SHA-256 252dec6d75399258…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 07:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c50ee43bc9112675ef568e644ed63fb4 SHA-1: 0fff21e01bf6f6b7561e654031ec849f1c098924 SHA-256: 252dec6d75399258d2512bb2722737fbcd62eb141efe7e31ced1e8decafae701
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS uploads. The presence of these links suggests an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ellev.fr/upload/files/36033012326.pdf In PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f273904d27---fitogena.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/53357949902.pdfIn PDF document text
    • http://519pf.com/userfiles/files/55433340407.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/jujesis.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b13993649fb---30104413199.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/83944191728.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/162311350194.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/83389856946.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/dasebozidawasivakove.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/pivuvalodi.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/shsn9v8gbgvsnqoml82u7fsouv/68346429132.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/19808741536.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/8534768bde78de1a01c8380fd998e233/kovoxadufejosujuxadol.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/xoxanamita.pdfIn PDF document text
    • http://herve-coiffure.ci/files/zawezisiw.pdfIn PDF document text
    • http://indexone.ru/upload/file/56038176689.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/nuriva.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/b23c4fa241b3824b7ba77824bfc8ece1/89461686994.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c20841a3f19dfc37aa3f6eff4d6681d7/59733956253.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb842c958---nasaj.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/h51hdv2v17fmussma0e3er6a6u/6777174928.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08d115237---lapilokofetutebegetuna.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fbc847925---vexisisetupas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=romeo+and+juliet+act+1+figurative+language+worksheet+answersPDF 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_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 11496 bytes
SHA-256: 1b44f0f7c224f045d6129e8f2d705eb699ab6fa8b740ee4cc5c4611e50a212d5
font_01_sfnt_off00010230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10230 18116 bytes
SHA-256: f04fdd290c3c850b8f3b217b31825a049b920a2f052fdf0c5aee4b064a358285
font_02_sfnt_off000130b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.