Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bc920a83af0ae3…

MALICIOUS

PDF

58.3 KB Created: 2021-06-19 02:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 378dee002ae118adc1c442729649c360 SHA-1: 3dee480efe84473053f2fee82910763b2a816ce8 SHA-256: 05bc920a83af0ae3970787b7d38551ce3c40efcf34618b4edf361be311e2024f
154 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

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://smidgel.ru/uplcv?utm_term=dollar+origami+christmas PDF link annotation
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d5ba27009866940bb70028c712b27c90/wurokov.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/hu9tf62c592oev9rakqdprbmiu/16455523431.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d0e5bc245---zekoperomexuzumo.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210609_D8D336D0CF71F08D.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/478c7b939d1275326e90c48138956484/94406922043.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f7520285a1ef43e872f6763a946f1041/lupanabogakijekoliwet.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/67754637484.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5f0ef853---rirulegokuparoriki.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/66050902349.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52e2ebf0bd---3117690430.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/viselefitarok.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/88014174616.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/63208633562.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c6a629f9c---rovuzanudawuwurutal.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/115be117609f40279602e186630b5b79/jadagonuxi.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_off0000d54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54E 5212 bytes
SHA-256: ec799f15c7e24efbfd04bd6a94db2f6b78558e6705853fcd4c02dfbbe788c7d0

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