Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ceac6730dfa82fb…

MALICIOUS

PDF

103.8 KB Created: 2021-08-14 21:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf80b3fe40d977a2a7cdeec2b3ae93fb SHA-1: 4a406f2bb892e35c5dd7e6151cdc37a9db3cedc4 SHA-256: 6ceac6730dfa82fb29a3946badce4a032aa1f4aa34c7b37b0b28b96a70089248
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 6

  • 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.
  • 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://infrive.ru/uplcv?utm_term=is+netflix+free+on+android+tv+box PDF link annotation
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f63e529b3---1859834600.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/8996212054.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/99539858028.pdfIn PDF document text
    • https://dietacud.eu/upload/file/xarotirovugexotakumeli.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/30794800342.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/19333849395.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/89655374821.pdfIn PDF document text
    • https://btegypt.com/file/67510179385.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9b534a279e994fc7440021fbbc65662e/83507269222.pdfIn PDF document text
    • https://argumentua.com/i/file/rebogijumegadif.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9cbca859baab82576ea8e6e3ec1e6fd8/87003956772.pdfIn PDF document text
    • https://yodobashi-church.com/vumuker.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/49807026770.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92235623721.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/59n51e31nd8gk16e200rruk70n/65843253188.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee85341748---tuteribifalebexepanizaro.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/85149942007.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/91118835015.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/sitaroxurotowiduboduzo.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/f942bce28d12df42e58702853b1a8856/pupuxopujomojeborasamaxom.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/72dafac2f426bd3c5e9787c24adabf2a/subedifotegakagugulojajo.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/gavivotatolejevefenixap.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04888e2540---vidapifazofemozasuwi.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f548da4727---xomukoduxani.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001358e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358E 17412 bytes
SHA-256: 992f4043cf8541146d2628d8179cdb45b0fcef27a51dc216097f59a6ae2eef25
font_02_sfnt_off00016301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16301 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off00017881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17881 10604 bytes
SHA-256: 3ce252a5da80d02fe3986d4729c09f7a9321002df71078e6b3f6a0c8a961c972

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