Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05eea408877b015…

MALICIOUS

PDF

84.8 KB Created: 2021-09-17 02:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1eebc8260cece5d7d497a2107b4fc933 SHA-1: 8170a6f68ba7fef71e8334753f5c87b82b812743 SHA-256: f05eea408877b0154a1aea0d749cd77d5002b3cd82ebc51ace76b68b79952a4a
164 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised websites and a specific URL that appears to be a download lure. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing and malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the detection suggest the PDF is designed to trick users into downloading and executing a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=ultimate+guitar+tabs+premium+apk PDF link annotation
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/pempjvm8sn1c0gqc0t8actnh7n/pagebazeduwefokejiz.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/marivev.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/49496114351.pdfIn PDF document text
    • http://www.siposferenc.hu/html/83388267617.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/19420998377.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c210946a4c08421ce25862c3e315c8c9/45326845416.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/80292162527.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/16789079047.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109120604074020.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/zimeja.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/12487710517.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bbf5b3451---25213242206.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/11037664743.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/nesonazatugikuzudit.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/fefapanegafi.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/7879195052.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/24782647835.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/78523599686.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313d9d55e42---losaruja.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/433f0420849b5db875a22e97f93f58db/gibawujukusefogabe.pdfIn PDF document text
    • http://suaups.net/userfiles/file/sixafiwogepo.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/79579426710.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/52622757148.pdfIn PDF document text
    • https://norservis.com/files/files/48991947179.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_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 10712 bytes
SHA-256: 672712fd6dc2660673e0fd5854cc4e5e44e2a8a0d1cb8b97adfefb87a0d24c0e
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 18480 bytes
SHA-256: 20f6efacf10459c7a696f4117477ffa97fabda41eb917b7681f70ea6d9434e0d
font_02_sfnt_off00012d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1