Malicious PDF — malware analysis report

Static analysis result for SHA-256 211dc2e2ec181c70…

MALICIOUS

PDF

87.9 KB Created: 2021-07-01 18:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 354c2410fe828cd1a1af57d79696b250 SHA-1: 39231b50e6f74dc342347584e371df42389de2d4 SHA-256: 211dc2e2ec181c7084dcba7ce9d08aede1f9773c111ce85929d2da9480f48fbf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, many of which are designed as link farms. These links are presented in a way that suggests a download for a movie, likely to trick users into clicking. The presence of ClamAV detection and ML classification strongly indicates malicious intent, specifically phishing and potentially trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://archism.ru/uplcv?utm_term=weathering+with+you+english+sub+full+movie+download PDF link annotation
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a299db2dda3---vulafalu.pdfIn PDF document text
    • http://computerdoki.hu/user/file/96359567736.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/debijawipirikiwovilerob.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/nusemano.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5e259609---jokaxuveguxesozu.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/34336476924.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16094d7f163124---86018340704.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/dutujibozaziseneterozi.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/97p893f9mogqj3hvh7a45387f7/sifaxa.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/40303449960.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/02d76b119052bc6e4a9eb5b27f88fd08/17582170301.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9a7a0607f---20553156765.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1f0ed88fefe86ae3a3075d11ef9fc5ed/leremijulevugiporagida.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/pokerobozaveredira.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf3471acd---buwuboxedovowakedonif.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b924420bbb5---zofalipejuwumijewanir.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/42076290574.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/4f116680d8d19959d859393a60163de7/48541581301.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3f0d829e3f632a6ffb6ae04089af11c4/92545690705.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/28555153886.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/33269808033.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/263adc4ba5f15adafcc0851b6f93a588/fenisugimafukuzuga.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd1d3a0c0---38133053759.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/13435372929.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/41802190006.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_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 11300 bytes
SHA-256: c83ace99c2de734e5fdd6f6eb7ce4a084a21785048f547912cd04fd1ba629e5a
font_02_sfnt_off000125d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 16920 bytes
SHA-256: e38081e4a5a2d3524813d9ee211ee83d2bbcd021cc70b0367a7ad4e52d1efdbb