Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec76652e8668afa…

MALICIOUS

PDF

72.1 KB Created: 2021-09-07 04:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98222276bc92f556120e362c0d8ac9c8 SHA-1: d15cc204a58344a7fa0784ebdcdb943c9c22563c SHA-256: dec76652e8668afa4e41e09f43a222b9a5ff3549322a005e9ba5c7c4312d6081
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised WordPress sites, acting as a link farm. Heuristics indicate these links are used to host other malicious PDFs, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection further support its malicious nature, likely involving the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

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 http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083d0be7799f---makejufubisajaxanolodali.pdf In PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/tagipozi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8aea44fcfb521dde58f29fc1dc61d908/kurujegilebavu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/fa6ba0481d1a402b28d3eefe6254cfa7/piruxadiger.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/59092479012.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160834f7bcc075---fasewosepuxibo.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ec5631i8v40tcenhnjgg9nu5ss/sokanoxi.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/tabaturazala.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da9a3c7f263---62113073122.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///968428478.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608609da937de---kapadekegexado.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/10478396713.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d156e5623---gisoweker.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/41946084081.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/gowilivivil.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0af5789db2524ab6d86b05eb3cc1c0f3/20953462498.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/wogupevavuvosobufejuninaf.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/baxar.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/6864c0bb0dafb8100d98c8d70c7c5d51/59957555888.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/zawusiziwiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=mbti+personality+questionnaire+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9f973527ce---kusizovopesobulez.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D5 17868 bytes
SHA-256: efe10fe92bec5bbe2b289cff8c4e0f6bffb555a8a8cf377b290710e6764d63b1
font_01_sfnt_off0001017f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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