Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0c24a902a00c79…

MALICIOUS

PDF

89.9 KB Created: 2021-07-03 05:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bf9d502b56caa05f74288fd519a7496b SHA-1: e51a72e0a31bee2fbbb25810a5ef34c227bd3e95 SHA-256: 7e0c24a902a00c79676d3b2b455f6cf83803c121de819f613a9c7d23c829ff4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=dhoom+2+full+movie+download PDF link annotation
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jh98d1vrgodu56bs7vft6p2ns0/tidimesirivukevozalobo.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60fcb642ef---fiweve.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/76012026674.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729fa94182d---85169228591.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/b6kinck1r3u5nmelbed8l44pmr/gulomodezexeguw.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/94103347609.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ad9e43d43---sudamudiku.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/janod.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd77daf091---40623490643.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/35037966529.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/zabozisavaliwixomubakuj.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/61352663382.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/pixepeporoso.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/jarazaraluxinobozam.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/mld796h089c638ghcctlvltdv6/lekosodofuvejoxe.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/virulazeruzubufe.pdfIn PDF document text
    • https://soechi.com/userfiles/file/90236214988.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/74232123324.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da59d3bf97---webanajemudopexi.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/padaziwuluw.pdfIn PDF document text
    • https://sce.tw/uploads/files/60c52d93888e0.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d74c3fd25ee---59198046105.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/surotilesawu.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/13617706141.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b07e728fb000873647ce20f30d50082e/mamujivazovibapawasajub.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160923c7826cba---66195123505.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_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 16960 bytes
SHA-256: a7cc8f3562022cf625ffa71c6e3b8c505841608c088cd78ab5fb6e3897fdd493
font_01_sfnt_off000129dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F4 10624 bytes
SHA-256: 6033767ea3052c986a85bc5c3aceb96a3e239b54c0d794ff7d86df29ba6f7c9b

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