Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c72d3e102c31bd7…

MALICIOUS

PDF

79.0 KB Created: 2021-07-07 19:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2e5f0ad48fcd4d2e5cc4cad853dd6cf1 SHA-1: 39dc6109dc350ed3ceee417b8c3693c2e7406145 SHA-256: 5c72d3e102c31bd79a0b75e55e529121769ad87c534efb7b9f9cfe7efa7c8b8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and is identified as a link farm, suggesting it is designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=havens+house+youth+services PDF link annotation
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8306f949---zilemakanibaviwutebajez.pdfIn PDF document text
    • http://vce34.ru/attachments/file/46082293477.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/86854803206.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/540eitfujev0cge54l3hokcicb/tosexikobewenorozorok.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ohulfonk5i3tj4v5pv63csa83t/66528133481.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/89137342336.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210520044722765091732.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/68114575398.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5eb953fff---migosap.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/5a0d5f91fbfb7cb88a514e8d604d631d/11138391771.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/50v374htigaqraslf0g62brtu7/vezevubuwevolojal.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/psds957pp919e5aiik3jhjmcn0/75017649244.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8769ec60---27847945311.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/46224555462.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2fb5e645a---rogunavokanilegi.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086b547c32f4---31468171742.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/jobugoliv.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/87881768983.pdfIn PDF document text
    • https://jetaime-shop.com/files/nemipowurepunebevajag.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/8289dhirjknrm3v3dj3incovap/putuvotatedaresupesemitek.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c96b200c2b---17716791356.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/gimojokovagaxobixepex.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796b1ce4f03---93627053360.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/77547125014.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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 10552 bytes
SHA-256: 7fc15c97b131a6ae5257af2584975f232fc9ba13d8a1e4467dfd876b9d506469
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 16848 bytes
SHA-256: af7b3093b8e22395e2259ab4fea13de72f6e4c148395fda222a1f28ae8afe1bc

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