Malicious PDF — malware analysis report

Static analysis result for SHA-256 9280c6a66f7798b0…

MALICIOUS

PDF

85.7 KB Created: 2021-08-26 01:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a17fe15da383de39fb164ae79f85244a SHA-1: b0037aae8ce2414bf979eed2ea6709b9953d2bb5 SHA-256: 9280c6a66f7798b050263260921dd6457e5ef8d23a4dab81dd1b6f765bc77a2a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The presence of embedded JavaScript and a large number of external URIs, many pointing to compromised CMS uploads or disposable hosting, suggests the document is designed to redirect users to malicious websites. The primary goal appears to be phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=lilith+in+the+niv+bible PDF link annotation
    • http://droneducational.com/admin/userfiles/file/76834597820.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/8pfcu3kia26ce74s50c1i0ka41/64720600607.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f178d3e4da---lutuwitevutoganawakez.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/62016354522.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/12822196057.pdfIn PDF document text
    • http://slpclassof67.com/clients/45391/File/virutenefumale.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/12810618804.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/31228345744.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/53443127073.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/63672147740.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/1728a9504a846532677eeafaf1f10512/21313226153.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/gorunusexowavitugopugi.pdfIn PDF document text
    • https://priscar.com/documents/files/13209949344.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/wemitulizir.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/gajoxurebudo.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/dowafolediradukep.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4eadad591---39554155749.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082faee2aa92---88694204678.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52f0334d6e---sumuzotarazegofufulo.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/toritaxeriwuzu.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa994c8f8---rokudiles.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc51e7a8f6---78917624954.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210702123026.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/tabegobetew.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/8270876704.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c431e8745b---26141244171.pdfIn PDF document text
    • 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_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 18112 bytes
SHA-256: 8d17f42fe89f08f18675d48fb9fee829f764c81ad99c3bb0eda326fcf682246a
font_01_sfnt_off00011ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BA 9816 bytes
SHA-256: a19a0634b130c3bf553ee3b6d388d68053151b95eb5c4adbc7f928ae99d0be41

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