Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9c8d77f514fa21…

MALICIOUS

PDF

63.6 KB Created: 2021-09-17 03:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7ff547c4cbb08b8e8c74cc8313be066e SHA-1: 74ca6ffff42b75145b632a50faa1b371dafa812f SHA-256: fd9c8d77f514fa211510744e66d55a840e5144595bf5f1106aab85fbabd9182b
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded JavaScript likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3819

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nvsrolko.org/ckfinder/userfiles/files/77707842215.pdf In PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/59590678772.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/degafinaketarekewetibof.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/xuvaxagemenego.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/81396155415.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/kuradopodetigevuxuleketir.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/dcad4dcf297961df2013da351c9162b1/96356591144.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/verevomobojisake.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4d7ac56d3---72606857841.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/mesegomipidelabidiwuxer.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/24129556833.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/36646883402.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210911124657.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/xovatotazamir.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109101554503840.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/915agg895nfer7pbr0554ds4sd/90660343277.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/naribukitevavela.pdfIn PDF document text
    • http://orthodoxnews.us/file/60091321927.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/92149572268.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/45670647662.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/89065429910.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/geposolelijugawez.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/kevetuwozagufekixadobegu.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/5182655687.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/jisutidevikiluvadidok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=video+recovery+pro+apkPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/nuwenivi.pdfIn PDF document text

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