Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e4b6201157f67f…

MALICIOUS

PDF

77.5 KB Created: 2021-06-09 11:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6af43d3cc8fd9d3465a8cc444f627ad0 SHA-1: cb5407283354ad1c7e438aa4accd12c232537e82 SHA-256: 05e4b6201157f67ffe31cec8883f16224f8d273a6302cee13263f6f0bc62c234
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8425

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=chloe18+vacation+guide PDF link annotation
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/87778267413.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/77917411410.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7645865c4---35509427944.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8bdf2dbb6---64117663261.pdfIn PDF document text
    • http://abnicum.com/files/file/surefunirirejim.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f067e885619f019fef14709550d534ef/tudatuzabufusevodakag.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/musofoputabib.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b44d4e0d6b2---toxamagimizonudofu.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c7502dd86---watijojiwulepogo.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/060ae47f4eaa9f7d747f37d0daa2d4a4/tifepurinukadaduvofexi.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/97b2c32266bbd76c1522e06fc26dcce1/nevefe.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/40010995465.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/niralinujadumokutajog.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1d3a73d582c1787572f87dd1610593e8/98454878494.pdfIn PDF document text
    • http://www.asslar.de/downloads/balodufum.pdfIn PDF document text
    • http://chinalabware.es/d/files/79001567483.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/96567159614.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 3504 bytes
SHA-256: 09e0ecd499ae10edcc6a3a62e840d9f86a3f52b4f939f8ae5a69e3e96f95bf35
font_01_sfnt_off000102da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DA 5140 bytes
SHA-256: 3ac54f580bd91e45604e17ae9d869565ab348a9f01ae2489c44e15bd7436bd47
font_02_sfnt_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 12496 bytes
SHA-256: 0b324adf6474a834917fc6c370c7bad2eb6eb83f74141660d85506eac5c88531

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