Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf2d8e0dfc8b0e4…

MALICIOUS

PDF

69.5 KB Created: 2021-09-27 05:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1256e32bcedab7de329637c0efa52559 SHA-1: facb37fb6b1e0e4a2e1a582f469845cc427717d3 SHA-256: bdf2d8e0dfc8b0e44f7bc981f444a9c41ccc11d3c3af161927f61a58cdbf6de1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=moto+3x+game+play+online', are likely used to distribute further malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://pixomot.ru/uplcv?utm_term=moto+3x+game+play+online PDF link annotation
    • https://dovolena-jiznicechy.cz/uploads/wililatovugivuzepobawoja.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/8566424fc561e07cb7489ffef66667cf/50502691551.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/selozeb.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/92127675465.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/17799636234.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/mebumupolalif.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/74875965442.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/niwulaloregoduxis.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/38091350120.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/22390718183.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/jopuba.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/23649919859.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/5375193454.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/76895955368.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/98188725789.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/rudiwe.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/914qrp4q9pp5ih0jui99bimmn6/vixikuvimefalulurenezagos.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/69523403816.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4fdcdc95de6ca53b6aaef08d2f7f453f/dukafiwo.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/legolex.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/dogapemopuwutinogojigiw.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/25938131539.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/xezitiverivajir.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1632452064.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/48209240345.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_off0000af8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A4 10708 bytes
SHA-256: 3856cc5f312a2bae82d55962fda66206fd2d18d89c7f492a865bf654a03f063d
font_02_sfnt_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 15376 bytes
SHA-256: 30187be46f74fd8d4ee9324327bef88d5a77c01f6336a6e6c10d375f0ca21505

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