Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7e0230d342a3f6…

MALICIOUS

PDF

150.3 KB Created: 2021-07-26 07:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f076e03d716db5986321c93f1e0e7250 SHA-1: 19abe936dca29731fd374feb2148b40d71cc302e SHA-256: 7a7e0230d342a3f6adfab183cb9445ca38404f8636c6b4fcba56ed38d3a707d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous distinct hosts and disposable hosting indicates a broad, potentially automated, distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5fd609f5a---wubexak.pdf In PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/671afb0c7d91f6bb56e9a11eaa47340e/ridotixesajesamapuleb.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776ce1bef6b---40126262022.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/35bae78cfc68798f39a9f8ebf6996afa/71406513784.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/5b2c42eed164fcb1cac24363fc5cfab6/megineleko.pdfIn PDF document text
    • http://vucert.vn/uploads/files/85542471148.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/46547975025.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/xapokifexotidamulisali.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/jemefutefobi.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb86ef613---dafapokozaxopelitubog.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/83913975122.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/88824915497.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/29816351926.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a95eafc955a---powigewurog.pdfIn PDF document text
    • https://italvaping.com/file/zuditatuxobifunu.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/bexozukoworenud.pdfIn PDF document text
    • http://hill-macktribe.com/clients/7/78/785e88641dcef8d5cadf71fa969cae92/File/85369150416.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/16ab39b0305301d74431eb9806ead6cc/57759442954.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/6623538900.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093f61178220---fixuj.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/99712809933.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/tiwipasekatiwul.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/58581128871.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/0icglehco5vts8iegoa3e7i9j0/taparekugorumuleneje.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/84272029068.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+great+debaters+movie+response+worksheet+answer+keyPDF 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_off0001eb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB3A 11252 bytes
SHA-256: 8d44e1e14a47a05dc33142ad72d6547d265ab42e5f07c0ee008f2154f5785838
font_01_sfnt_off00020518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20518 17216 bytes
SHA-256: a7d7223dfb59e171b98fa3b9192897038d8d943d3e50c71177fe30d1b3fd5083
font_02_sfnt_off00023205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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