Malicious PDF — malware analysis report

Static analysis result for SHA-256 0455e3d54c4ecb7e…

MALICIOUS

PDF

75.2 KB Created: 2021-07-05 16:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d2d5d9c9ac697a5fc7b4a54f434ff357 SHA-1: c65f805bd3f6fc667144b301911800c7aea542b9 SHA-256: 0455e3d54c4ecb7e33a2ef5ac18e1fa76ca3d6aba697eac3d03ac9ac56e92390
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://medvor.ru/uplcv?utm_term=the+intouchables+full+movie PDF link annotation
    • https://webmenuplus.com/images/file/rojawelaxefirakexoxi.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/konogaputalugepo.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/55145678452.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/2db2478362513e065a0ed34496138e0f/87832061031.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/245e44903b4e30866d92f056c0ab6281/zusuzebawira.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f112dae3a0---dijesigevapanisekexokaj.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da610b496---fuzunapitewize.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/13384575389.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/52654ec9f34b173d026e5fa61f637692/14415924592.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/859342f12ad365678be773a53f51e8c9/bobuzusorubisebuzimeruvi.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/kepazutisotib.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/79340967760.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d3a66774e---21247850662.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/3shh8meukvcmaf43d1gb1755b7/62840860184.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/nobax.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9d18fdcba923ebf7b9e96f42e3628621/mupimukibofabotezapidi.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36b893090---dexuzumubibivekugoziwero.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/wiziz.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/3186133225.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d09c8024b---dugaxesabunadefox.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/708784921a2cca6c9955b4a1502ef1c9/wuvifol.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_off0000c041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC041 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 17988 bytes
SHA-256: 4412cd83d6f0af8b8ab9e9ae41cda31f5ea966ea38ff337326c23e54bfbe1a8d
font_02_sfnt_off00010579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 10772 bytes
SHA-256: 6058573cd4ff2ca639e63661c361d070ca62b494a26560da3e9adb8cf14b2bb2

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