Malicious PDF — malware analysis report

Static analysis result for SHA-256 71aeac392109ce79…

MALICIOUS

PDF

62.8 KB Created: 2021-06-11 15:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 449438c8d6008869c8b0a5711e72d653 SHA-1: 24c6454b552e75f367377fc1c8b8aef7844ca69d SHA-256: 71aeac392109ce79397a25b19a75b68764653ff3e93e881fa46217669d8a1719
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content or phishing attempts. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially track campaign effectiveness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

Heuristics 5

  • 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
  • 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://ketchas.ru/uplcv?utm_term=example+of+present+tense PDF link annotation
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d521587721---11866165684.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/62q5lj0abtn6bjvkeovdvqhu28/40339543842.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/fokap.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ub4ob7kl7g6aou279d4678ogke/xijinubebi.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6a2a84bd1595342031b5f7de0c421099/dudixiva.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e46382b86d1e791c5ed2ca3e8a14d0c8/79110618795.pdfIn PDF document text
    • http://amandamaitland.com/images/file/kevageketip.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/voxidug.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/saxanojup.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1bc8465f4---sagamuwek.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c48ccde78c---27060293074.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/namemujebolelipisevevipob.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/5ada0eee6ce4320d55841a0d3b223aab/fazesaxifotibezudunix.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/b2797bcbb44e05784dc18e5d1ea3666e/tipikoxi.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854b7e36f80---figelutoxa.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aae432341---96326851607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 5072 bytes
SHA-256: c2198fd7f9e8aca67a0ed831b79e773ae77ea6b585783e40cc7b7ed7fa72ada2

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