Malicious PDF — malware analysis report

Static analysis result for SHA-256 e547b66e575cdb85…

MALICIOUS

PDF

140.1 KB Created: 2021-07-24 21:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3b99a75ebe677f264a73f82a1602fa6 SHA-1: a4fe5a8b864ddc8b41765b49f59d4e8c470cbf0c SHA-256: e547b66e575cdb85cae8880b2607b905296b6a3cfc2f6456a38d280593372a82
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40e69905ae---dufaxobotorikusiga.pdf In PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/70256528403.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/18076880415.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/17df484e18750cb0b6c79a35a1cc9528/xonawufenepabubodonelup.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/m6njiigvlk7aojikbi2rsi1coe/milumaxojoda.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/televeniv.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/lrsag6d9gb2vcvsaj7bdbugh15/dusagepesunojudunawofajeg.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be030897c55---19658055645.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/moxijov.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc31eaccb---sagafewuw.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a393bce625---87011651987.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/95227642289.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ae5f435a8---rorakugoxinos.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/5meofl4sd6tkrtat8dihfmtq8n/rimudujofubadet.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/2d979cd6b24be1feb14ac175f26d9a13/kobusupofibol.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/d175684cd57ef43c44017c06b22acf59/dikezagudete.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/v5v9uqn9adaru9e9g1ocllhl99/38602641064.pdfIn PDF document text
    • http://changdahk.com/upload/suzolezezegevuzebi.pdfIn PDF document text
    • http://sharise.net/Uploadfiles/files/46539628958.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210609001543.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/fab3620a8f61dd9f6c9072c56357cd32/sonigobixirul.pdfIn PDF document text
    • http://landia-print.com/pdir/file/jaserid.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb5fee685f---muvuridoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cours+sur+l%27audit+financier+pdfPDF 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_off0001bdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDCC 19840 bytes
SHA-256: 372c46b5c6fb5c916c1b733d4e4abff87780e8ae069fb0ee86dd2d04ccc978d6
font_01_sfnt_off0001ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF19 10780 bytes
SHA-256: 018a2e9f9fd633b06b430c0f40c37f8578b3b1887471fc3c96b48e76c1026f2b
font_02_sfnt_off0002081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2081C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1