Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa267a2b5252080…

MALICIOUS

PDF

88.5 KB Created: 2021-06-22 20:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 250c2a158af5ccae7820f6ac01a7f350 SHA-1: cef9cbe5482599b99d84b0372cbfa7bc261bd52d SHA-256: ffa267a2b52520803ebec4d7f2cb4f7b9bc3f9fab1564dfbf67fc6a7b070fd46
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The heuristic firings indicate a high likelihood of malicious content, with ClamAV specifically identifying it as a phishing trojan. The embedded URLs, such as 'https://krisoc.ru/uplcv?utm_term=gwent+the+witcher+card+game+mod+apk', suggest a lure related to game mods, aiming to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://krisoc.ru/uplcv?utm_term=gwent+the+witcher+card+game+mod+apk PDF link annotation
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935caa34532---48852142197.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/sijufefajajaxajepopotoma.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085d61b94210---rapaxewozolunuz.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a90800ae---jeven.pdfIn PDF document text
    • https://kede.org/userfiles/file/23215863978.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/8ed028635fb5a4e7f7e36818f8df6f8a/dujoxudomalopedena.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5a563fdb---44910992400.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/gisisalabixokevenebizevew.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094672304ae4---45468385803.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160737ca4cd8d1---21158670682.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5847e0990---75143731123.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/sokat.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/d3d1f7af39065a5ae2602f50c5baffad/dufizufisawirefafavi.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609abae23ceb8---furowugidixiz.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e2e8a63e---gijefube.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/runol.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b78b1d8d27---38540288057.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b06751e33a5---kipilegu.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/tixorujoxeju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF9 5464 bytes
SHA-256: 146f3a9e19d0f7b5e6ca31f87b6f17f499d2099e475afbf9405a11ede505e85c
font_01_sfnt_off00012f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F80 11012 bytes
SHA-256: afb5558b479bbfaf9f72b8890997648ea904c61566ed44ca41b0e36be5c41162

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