Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdd7c2f93747d43…

MALICIOUS

PDF

138.4 KB Created: 2021-08-19 00:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f74bd5a0edf535c98ab06e497f65245b SHA-1: 5341aaa9f61c6a0c7c9ca40be3ef2899a86dce74 SHA-256: efdd7c2f93747d43020e3f3e82fcb14e5ddd7435696664bcea7dba332ca2800c
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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 http://maroba-zirndorf.de/file/34697984748.pdf In PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c4ae43b0f8a3fa015874d601d8c5dcde/visulata.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/kibavitirigu.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/73755656170.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace513ab867---vameponiwixelugoru.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/lumuz.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/nebinaborigo.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/narenatemilotitewubew.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/52366313108.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/54626344106.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/71128703744.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/sojobasosolisina.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/jinawazonemisixese.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b71658a6a4---wifazafinupopima.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/wanekosezusadugujarafat.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/bipofowat.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a00e0a19002---gemiregak.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/24079617742.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/6fca7c28d0fb6c681573a0a1edf1fbce/94900301926.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/4819019479.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/jarofabogesukidotozu.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2b94425a15e1e6446ff2d66af34d74f9/rinukunepux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=vector+mechanics+for+engineers+statics+11th+edition+solutions+chapter+4+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FBC 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_01_sfnt_off0001b4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4F2 11268 bytes
SHA-256: 680f1f4ca1240cdc9ac4d6138a86308abeaf24adee030007d12e1b319205d496
font_02_sfnt_off0001cf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF16 18760 bytes
SHA-256: b96e4e552d8ed4226ae4a1ebaf9f01a2c31dc18e4819782f1dc2fd107c121b97
font_03_sfnt_off000201c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.