Malicious PDF — malware analysis report

Static analysis result for SHA-256 09947cdd7ee8a566…

MALICIOUS

PDF

71.9 KB Created: 2021-06-12 20:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8c8dc3453bf4aa0855e6d76ca927b8bb SHA-1: 7e0a2c52e84b65833963d9373a46833bb657e5ea SHA-256: 09947cdd7ee8a5669a27de39900c79aa3adbade6838a2bcb45d31d72f1065674
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised WordPress sites, likely to download further malicious payloads. The presence of external URIs and compromised CMS upload links suggests a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

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://queure.ru/uplcv?utm_term=good+cv+format+pdf PDF link annotation
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/f86ca9913d13017f73be155069c8f8da/vododuwabozeneranak.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gl98pr4mtct0uerkbnp2c65g4g/75641454041.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddffc0d07b---waxopeverozinad.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/f8u59vpqfv2vk3o8ke702fjdt6/zidugoginevureviganusibix.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/winotuxinalitusij.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/55bpp6nf92pc26r1p31jmqn7dj/zilagupomokokitokug.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a709217e1---pimukujajega.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072f72d74806---8364182141.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/51233654169.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35ea6da24---71017161872.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef88f16af7---86928530403.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/96188175690.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d95e11aa11a8fb9c8a1d98611d7b22cf/81580823596.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/994c75f2bb57b3cdc1617423bbd2852b/38264692350.pdfIn PDF document text
    • http://apvn.info/userfiles/file/38984804045.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/majmj1q6itomgffr797eas4kdm/madewijinigusopuxo.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798eb3e464a---zodikulifiduxagafotaxi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 4696 bytes
SHA-256: 4d5ec2a6cc1cffd539b3313d57ffd79f9df07619689e7bde3aae72d97e076ff4
font_01_sfnt_off000101f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 10476 bytes
SHA-256: a0ff8b2250a73c441f507b466e6af4c6901abb753db0619a8ad5bd75eb9b8c1f

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